Magnetic field driving and sensing circuit

Abstract

The invention discloses a magnetic field driving and sensing circuit, which relates to the field of magnetic field positioning, and is characterized by comprising a quasi-static driving magnetic field module, a magnetic field sensing module and a driven module, and can realize remote position and attitude regulation and monitoring of a driven unit at the same time. The quasi-static driving magnetic field module is composed of an adjustable direct current source and a transceiving electromagnetic coil; the multiple groups of quasi-static driving magnetic field modules can generate quasi-static magnetic fields with different directions and intensities through magnetic field vector superposition, and the quasi-static driving magnetic field modules can change the directions and intensities of the magnetic fields by adjusting the direct current output of each path of adjustable direct current source at the same time. According to the circuit and the system, a quasi-static driving magnetic field function and a high-frequency sensing magnetic field function are integrated together. Compared with the prior art, a complex and huge driving device and a positioning device do not need to be arranged respectively, and the problem that in the prior art, remote driving and positioning functions of the magnetic field are difficult to achieve in a small space at the same time is solved.

Description

Technical Field

[0001] The present invention relates to the field of magnetic field positioning, and more particularly to a magnetic field driving and sensing circuit. Background Art

[0002] In many of today's technological application fields, such as the control and monitoring of in-vivo medical devices in medical equipment, and the driving and status monitoring of moving parts in industrial equipment, there is an urgent need to realize remote driving and positioning functions of magnetic fields in a smaller space.

[0003] Existing technical solutions can achieve magnetic field drive or magnetic field positioning functions to a certain extent, but there are many limitations. As far as magnetic field drive technology is concerned, some traditional drive magnetic field generating devices are complex in structure and bulky in size, making it difficult to effectively layout them in a limited small space. For example, some drive systems based on large electromagnetic induction devices have physical dimensions and complex wiring structures that limit their application in miniaturized devices. In addition, such devices often focus on a single magnetic field drive function and lack effective integration with positioning functions.

[0004] In terms of magnetic field positioning technology, existing positioning systems usually require independent sensors and complex signal processing units, which take up a large space. For example, the traditional positioning system based on radio frequency identification (RFID), although it can provide relatively accurate positioning information, cannot meet the requirements of compact space in small equipment scenarios that need to realize driving functions at the same time due to its multi-component architecture.

[0005] In addition, even though some technologies attempt to combine the driving and positioning functions, it is difficult to accurately realize the magnetic field remote driving and positioning functions simultaneously in a small space due to magnetic field interference, signal coupling and other problems in the process of miniaturization. This situation seriously limits the development of related equipment in the fields of medical and industrial fields towards miniaturization and integration, so a new circuit and system is urgently needed to overcome these problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, an object of the present invention is to provide a magnetic field driving and sensing circuit.

[0007] The above technical purpose of the present invention is achieved through the following technical solutions: the magnetic field driving and sensing circuit includes a quasi-static driving magnetic field module, a magnetic field sensing module and a driven module, which can simultaneously realize remote position and posture control and monitoring of the driven unit.

[0008] Furthermore, the quasi-static driving magnetic field module is composed of an adjustable DC source and a transceiver electromagnetic coil; multiple groups of the quasi-static driving magnetic field modules can generate quasi-static magnetic fields of different directions and intensities by superposition of magnetic field vectors, and the quasi-static driving magnetic field module can also change the direction and intensity of the magnetic field by adjusting the DC output of each adjustable DC source.

[0009] Furthermore, the magnetic field sensing module is composed of a plurality of transceiver electromagnetic coils, a high-frequency magnetic field generating circuit and a high-frequency magnetic field receiving circuit.

[0010] Furthermore, the driven module is composed of a micro electromagnetic coil and a DC power supply structure.

[0011] Furthermore, the quasi-static driving magnetic field module can drive the transceiver electromagnetic coil to generate a quasi-static magnetic field of a certain intensity, and the DC output current of the adjustable DC source can be adjusted.

[0012] Furthermore, the transceiver electromagnetic coil is connected to an adjustable DC source, and generates a quasi-static magnetic field of a certain intensity under the drive of the adjustable DC source; multiple groups of transceiver electromagnetic coils are simultaneously connected to the high-frequency magnetic field generating circuit and the high-frequency magnetic field receiving circuit in sequence according to a preset timing.

[0013] Furthermore, the magnetic field sensing module is connected to a group of transceiver electromagnetic coils, and can generate a high-frequency electrical signal with a certain time length flowing into the transceiver electromagnetic coils to generate a high-frequency electromagnetic signal.

[0014] Furthermore, the magnetic field sensing module is connected to multiple groups of transceiver electromagnetic coils when the high-frequency magnetic field generating circuit stops emitting high-frequency current, and can analyze the phase and amplitude of the signal based on the high-frequency electromagnetic induced signal generated by the micro electromagnetic coil received by the transceiver electromagnetic coil.

[0015] Furthermore, the micro electromagnetic coil is connected to a DC power supply structure, and can be deflected or moved due to the Lorentz force in a quasi-static magnetic field of a certain intensity generated by the transceiver electromagnetic coil; at the same time, it can generate a high-frequency electromagnetic induced signal based on electromagnetic induction when receiving a high-frequency electromagnetic signal generated by the transceiver electromagnetic coil driven by a high-frequency electromagnetic generating circuit.

[0016] In summary, the present invention has the following beneficial effects:

[0017] 1. Functional integration

[0018] The circuit and system of the present invention integrate the quasi-static driving magnetic field function and the high-frequency sensing magnetic field function. Compared with the prior art, there is no need to separately set up a complex and large driving device and a positioning device, which solves the problem that the prior art is difficult to simultaneously realize the magnetic field remote driving and positioning functions in a small space.

[0019] 2. Compactness

[0020] Due to the reasonable design of the circuit structure of each part, such as the reuse of the transceiver electromagnetic coils in the quasi-static driving magnetic field generating part and the magnetic field sensing circuit, and the compact driven module composed of the miniature electromagnetic coil and the DC power supply structure, the entire circuit and system structure are compact and suitable for the application requirements of miniaturized equipment.

[0021] 3. Wide application

[0022] In the field of medical equipment, it can be used for position control and status monitoring of in-vivo medical devices, such as precise driving and positioning of implantable medical devices; in the field of industrial equipment, it can drive and monitor moving parts to improve the automation and accuracy of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a circuit and system that can generate a quasi-static driving magnetic field and a high-frequency sensing magnetic field. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] Example:

[0026] 1. Circuit structure

[0027] 1. Quasi-static drive magnetic field generating part

[0028] This part of the circuit is mainly composed of a transceiver electromagnetic coil and an adjustable DC source. The transceiver electromagnetic coil is a key element in generating a magnetic field and works in conjunction with the adjustable DC source. The adjustable DC source can provide a stable and adjustable DC current. When the current passes through the transceiver electromagnetic coil, a quasi-static driving magnetic field is generated according to the principle of electromagnetic induction. This structural design is simple and compact. By reasonably selecting the parameters of the transceiver electromagnetic coil and adjusting the output of the DC source, the intensity and distribution of the quasi-static driving magnetic field can be effectively controlled.

[0029] 2. Magnetic field sensing circuit

[0030] The magnetic field sensing circuit is composed of a transceiver electromagnetic coil, a high-frequency magnetic field generating circuit, and a high-frequency magnetic field receiving circuit. The transceiver electromagnetic coil plays a dual role in this part of the circuit, participating in both the transmission and reception of the high-frequency magnetic field. The high-frequency magnetic field generating circuit is responsible for generating a high-frequency current with a specific frequency and duration. After this current is connected to the transceiver electromagnetic coil, it will excite a high-frequency magnetic field in the surrounding space. When the transmission of the high-frequency current ends, the transceiver electromagnetic coil is connected to the high-frequency magnetic field receiving circuit through a switching mechanism to receive the high-frequency electromagnetic signal secondary emitted by the micro electromagnetic coil due to inductive reactance.

[0031] 3. Driven module

[0032] The circuit of the driven module is composed of a micro electromagnetic coil and a DC power supply structure. The DC power supply structure provides a stable DC power supply to the micro electromagnetic coil. In the presence of a quasi-static driving magnetic field, the current in the micro electromagnetic coil will be affected by the Lorentz force in the magnetic field. Due to the small size of the micro electromagnetic coil, this structure can realize the function in a compact space, and according to the principle of Lorentz force, the micro electromagnetic coil will deflect or move, thereby realizing the remote driving function.

[0033] 2. System Working Principle

[0034] 1. Quasi-static magnetic field drive and micro electromagnetic coil movement

[0035] When the system starts working, the adjustable DC source drives multiple transceiver electromagnetic coils to generate a quasi-static magnetic field of a certain intensity. At the same time, the DC power supply structure in the driven module provides DC current to the micro electromagnetic coil. Under the combined action of the quasi-static magnetic field and the micro electromagnetic coil current, the micro electromagnetic coil will deflect or move. The driving force for deflection or movement can be calculated by the formula F=I×L×B1×sin(θ) (where F is the driving force exerted on the micro electromagnetic coil, I is the DC current, L is the wire length, B1 is the magnetic induction intensity of the quasi-static magnetic field, and θ is the angle between the wire and the magnetic force). This movement can be used to remotely drive related components in small devices, such as driving in-vivo medical devices to perform specific actions in medical equipment.

[0036] 2. High-frequency magnetic field transmission, reception and positioning functions

[0037] At the same time, the high-frequency magnetic field generating circuit generates a transmitting high-frequency current with a certain time length t and frequency f and connects to the transmitting and receiving electromagnetic coil, thereby generating a high-frequency magnetic field with a magnetic field strength of H2 in space. When the transmitting high-frequency current ends, the system switches to the high-frequency magnetic field receiving circuit to connect the transmitting and receiving electromagnetic coil. At this time, the signal received by the high-frequency magnetic field receiving circuit is a high-frequency electromagnetic signal secondary emitted by the micro electromagnetic coil due to inductive reactance.

[0038] In terms of positioning calculation, it is assumed that the propagation of high-frequency magnetic field in space satisfies a certain wave equation, and the intensity of high-frequency electromagnetic signal emitted by the micro-electromagnetic coil is related to its position. Based on Maxwell's equations and the law of electromagnetic induction, we can derive the formula related to positioning. Let the position coordinates of the micro-electromagnetic coil be (x, y, z), and the signal strength received at the receiving point (transmitting and receiving electromagnetic coil) be S i , then there exists a functional relationship S i =g(x, y, z, t, f, H2), where g is a function determined by factors such as the electromagnetic properties and geometric structure of the system.

[0039] By analyzing the signals collected by multiple transceiver electromagnetic coils, according to the phase φ of the signal i and amplitude information A i , combined with the above functional relationship and the basic principles of electromagnetism, the attitude and position of the driven module can be calculated. For example, in an ideal situation, if we consider that the propagation of high-frequency magnetic field in a homogeneous medium is in the form of spherical waves, we can solve the following equations:

[0040]

[0041] (Where S0 is the initial signal strength, r i is the distance, ω=2πf is the angular frequency, k is the wave number), by measuring the phase difference Δφ between the signal received by different transceiver electromagnetic coils and the original transmitted signal i =φ0-φ i and amplitude ratio By using parameters such as the position of the micro electromagnetic coil, the position and posture of the moving parts can be accurately monitored in industrial equipment.

[0042] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic field driving and sensing circuit, characterized in that: It includes a quasi-static driving magnetic field module, a magnetic field sensing module and a driven module, which can simultaneously realize remote position and posture control and monitoring of the driven unit.

2. A magnetic field driving and sensing circuit according to claim 1, characterized in that: The quasi-static driving magnetic field module is composed of an adjustable DC source and a transceiver electromagnetic coil; multiple groups of the quasi-static driving magnetic field modules can generate quasi-static magnetic fields of different directions and intensities by superposition of magnetic field vectors, and the quasi-static driving magnetic field module can also change the direction and intensity of the magnetic field by adjusting the DC output of each adjustable DC source.

3. A magnetic field driving and sensing circuit according to claim 1, characterized in that: The magnetic field sensing module is composed of a plurality of transceiver electromagnetic coils, a high-frequency magnetic field generating circuit and a high-frequency magnetic field receiving circuit.

4. A magnetic field driving and sensing circuit according to claim 1, characterized in that: The driven module is composed of a micro electromagnetic coil and a direct current power supply structure.

5. A magnetic field driving and sensing circuit according to claim 2, characterized in that: The quasi-static driving magnetic field module can drive the transceiver electromagnetic coil to generate a quasi-static magnetic field of a certain intensity, and the DC output current of the adjustable DC source can be adjusted.

6. A magnetic field driving and sensing circuit according to claim 2-3, characterized in that: The transceiver electromagnetic coil is connected to an adjustable DC source, and generates a quasi-static magnetic field of a certain intensity under the drive of the adjustable DC source; multiple groups of transceiver electromagnetic coils are simultaneously connected to a high-frequency magnetic field generating circuit and a high-frequency magnetic field receiving circuit in sequence according to a preset timing.

7. A magnetic field driving and sensing circuit according to claim 3, characterized in that: The magnetic field sensing module is connected to a group of transceiver electromagnetic coils and can generate a high-frequency electrical signal with a certain time length to flow into the transceiver electromagnetic coils to generate a high-frequency electromagnetic signal.

8. A magnetic field driving and sensing circuit according to claim 3, characterized in that: The magnetic field sensing module is connected to multiple groups of transceiver electromagnetic coils when the high-frequency magnetic field generating circuit stops emitting high-frequency current, and can analyze the phase and amplitude of the signal based on the high-frequency electromagnetic induced signal generated by the micro electromagnetic coil received by the transceiver electromagnetic coil.

9. A magnetic field driving and sensing circuit according to claim 3, characterized in that: The micro electromagnetic coil is connected to a DC power supply structure, and can be deflected or moved due to the Lorentz force in a quasi-static magnetic field of a certain intensity generated by the transceiver electromagnetic coil; at the same time, it can generate a high-frequency electromagnetic induced signal based on electromagnetic induction when receiving a high-frequency electromagnetic signal generated by the transceiver electromagnetic coil driven by a high-frequency electromagnetic generating circuit.

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