Modularized magnetic suspension balance system

Abstract

The utility model discloses a modularized magnetic suspension balance system, which relates to the technical field of mass measurement and comprises a main control module, a driving module, a permanent magnet combination module, a measurement module and a communication module. The driving module comprises a DAC module, a power amplifier combination module electrically connected with the DAC module and an electromagnet combination module arranged corresponding to the power amplifier combination module, and the DAC module communicates with the main control module by adopting an SP I protocol; the permanent magnet combination module is correspondingly arranged at the electromagnet combination module; the measurement module comprises a measurement sensor combination module and an ADC module electrically connected with the measurement sensor combination module, and the ADC module communicates with the main control module by adopting an SP I protocol; the communication module comprises a serial port communication port, a network port and a Bluetooth communication port, and the communication module is in communication connection with the main control module. The magnetic suspension balance system has the advantages of high flexibility, convenience in maintenance, high expansibility and the like through modular design, so that the universality and the practicability of the magnetic suspension balance are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mass measurement, in particular to a modular magnetic levitation balance system. Background Art

[0002] The magnetic levitation balance realizes non-contact precise measurement of an object through magnetic levitation technology, and is applicable to sample mass monitoring in extreme environments such as vacuum, high temperature, high pressure, corrosive gas, etc., and has broad application prospects in multiple disciplinary fields such as physics, chemistry, and biology.

[0003] In terms of structural composition, the magnetic levitation balance can be designed as a single or multi-actuator architecture according to actual needs, and different types of sensors can also be selected according to requirements.

[0004] The selection and combination methods of these components will affect the performance and application range of the system. For example, the magnetic levitation balance with a single actuator has a simple structure but the levitation state is easily interfered, while the magnetic levitation balance with multi-actuators can provide a larger measurement range but has a complex structure. In addition, there are various types of displacement sensors, and each sensor has its unique characteristics and application scenarios.

[0005] In terms of control and measurement, the principles of the magnetic levitation balance system are basically the same. Therefore, the structure of the system can be adjusted to adapt to different application requirements, and various different measurement tasks can be achieved by reasonably selecting and configuring the components of the system. Content of the Utility Model

[0006] The utility model provides a modular magnetic levitation balance system to solve the technical problem that the existing magnetic levitation balance system cannot be expanded and has poor versatility.

[0007] To solve the above problems, the utility model provides a modular magnetic levitation balance system, including:

[0008] A main control module;

[0009] A driving module, including a DAC module, a power amplifier combination module electrically connected to the DAC module, and an electromagnet combination module correspondingly arranged with the power amplifier combination module. The DAC module communicates with the main control module using the SPI protocol;

[0010] A permanent magnet combination module, correspondingly arranged at the electromagnet combination module;

[0011] A measurement module, including a measurement sensor combination module and an ADC module electrically connected to the measurement sensor combination module. The ADC module communicates with the main control module using the SPI protocol;

[0012] The communication module includes a serial communication port, a network port, and a Bluetooth communication port integrated together, and the communication module is communicatively connected to the main control module.

[0013] Preferably, it further includes a human-computer interaction module, and the human-computer interaction module is communicatively connected to the main control module through the I 2 C protocol and RGB.

[0014] Preferably, the human-computer interaction module is a touch display screen.

[0015] Preferably, the measurement sensor combination module is a combination of one or more of a displacement sensor, a current sensor, a pressure sensor, a temperature sensor, and a humidity sensor.

[0016] Preferably, the electromagnet combination module is a combination of one or more electromagnets.

[0017] Preferably, the permanent magnet combination module is a combination of one or more permanent magnets.

[0018] Preferably, the displacement sensor is a Hall displacement sensor, and the Hall displacement sensor is located directly above the permanent magnet combination module.

[0019] Preferably, the displacement sensor is a differential transformer type displacement sensor, and the differential transformer type displacement sensor is located in the middle of the permanent magnet combination module.

[0020] Preferably, the displacement sensor is any one of an eddy current displacement sensor and a laser displacement sensor, and the eddy current displacement sensor or the laser displacement sensor is installed at the bottom of the permanent magnet combination module.

[0021] Preferably, the power amplifier combination module is a combination of one or more power amplifiers, and the number of power amplifiers is equal to the number of electromagnets.

[0022] The present utility model has remarkable advantages and beneficial effects compared with the prior art, which are specifically reflected in the following aspects:

[0023] The magnetic levitation balance in this application consists of a balance main body housing, a reaction chamber, a magnetic levitation actuator structure, a sample basket, and a display component. The balance main body housing serves as the main structure of the magnetic levitation actuator structure, ensuring on the one hand that internal measurements are not disturbed by the outside world, and on the other hand also serving as the installation and support carrier for the reaction chamber, the magnetic levitation actuator structure, the sample basket, and the display component. The reaction chamber is arranged inside the balance main body housing to ensure that the test is not interfered with by the outside world, and the reaction chamber is airtight and has a sample access window. The magnetic levitation actuator structure includes an electromagnet assembly and a magnetic levitation rotor assembly. The electromagnet assembly is arranged coaxially above the magnetic levitation rotor assembly, and its top is connected to the inner top of the reaction chamber and the balance main body housing. The electromagnet assembly can be a single electromagnet or a combination of multiple electromagnets as a modular design, and the magnetic levitation rotor assembly can also be a single permanent magnet or a combination of multiple permanent magnets as a module, thus constituting a single-actuator magnetic levitation balance or a multi-actuator magnetic levitation balance. The sample basket is vertically connected to the magnetic levitation rotor through a hook. The display component is installed on the top of the balance main body housing. Through modular design, each part of the balance can be independently replaced, upgraded, or combined, achieving the advantages of high flexibility, easy maintenance, strong expandability, and high cost performance, meeting the needs of different users and application scenarios, and providing a more convenient, efficient, and economical measurement solution. Description of the Drawings

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the magnetic levitation balance in the embodiment of the present invention;

[0025] Figure 2 It is an internal structural schematic diagram of the magnetic levitation actuator in the first embodiment of the present invention;

[0026] Figure 3 It is an internal structural schematic diagram of the magnetic levitation actuator in the second embodiment of the present invention;

[0027] Figure 4 It is an internal structural schematic diagram of the magnetic levitation actuator in the third embodiment of the present invention;

[0028] Figure 5 It is an exploded structural schematic diagram of the magnetic levitation actuator in the embodiment of the present invention;

[0029] Figure 6 It is a connection structural schematic diagram between the main control module, the display component, and the drive module of the magnetic levitation actuator in the embodiment of the present invention.

[0030] Description of the Reference Numerals:

[0031] 1 - Main control module;

[0032] 2 - Driving module; 21 - DAC module; 22 - Power amplifier combination module; 221 - Power amplifier; 23 - Electromagnet combination module; 231 - Electromagnet; 232 - Screw rod

[0033] 3 - Permanent magnet combination module; 31 - Permanent magnet; 32 - Mover rod; 33 - Permanent magnet seat

[0034] 4 - Measurement module; 41 - Measurement sensor combination module; 411 - Displacement sensor; 4111 - First Hall sensor; 4112 - Second Hall sensor; 4113 - Sensor measurement reference object; 42 - ADC module

[0035] 5 - Communication module; 6 - Human - machine interaction module

[0036] 10 - Balance main body housing

[0037] 11 - Frame top plate; 12 - Frame side plate; 13 - Adapter plate; 14 - Vibration isolation platform

[0038] 20 - Reaction chamber

[0039] 30 - Sample basket; 40 - Hook

[0040] 50 - Support structure; 501 - Support rod; 5011 - First screw rod; 5012 - Second screw rod; 502 - Support platform; 5021 - Upper support plate; 5022 - Lower support plate

[0041] 60 - Touch display screen Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0043] It should be noted that when an element is referred to as being "fixed to", "arranged on" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] In addition, the terms "first", "second",... are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second",... may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0045] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "provided with" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] As Figure 1 shown, an embodiment of the present utility model provides a modular magnetic levitation balance system. The magnetic levitation balance system includes a main control module 1, a drive module 2, a permanent magnet combination module 3, a measurement module 4, and a communication module 5, wherein:

[0047] The drive module 2 includes a DAC module 21, a power amplifier combination module 22, and an electromagnet combination module 23. The power amplifier combination module 22 is electrically connected to the DAC module 21, and the electromagnet combination module 23 is correspondingly arranged with the power amplifier combination module 22. The DAC module 21 communicates with the main control module 1 using the SPI protocol; the permanent magnet combination module 3 is correspondingly arranged at the electromagnet combination module 23; the measurement module 4 includes a measurement sensor combination module 41 and an ADC module 42. The ADC module 42 is electrically connected to the measurement sensor combination module 41, and the ADC module 42 communicates with the main control module 1 using the SPI protocol; the communication module 5 includes a serial communication port, a network port, and a Bluetooth communication port integrated together, and the communication module 5 is communicatively connected to the main control module 1.

[0048] The main control module 1 runs a control algorithm. According to the input signal, it generates a multi-channel adjustable voltage signal through the DAC module 21 and amplifies it through the power amplifier 221, and then quickly and accurately adjusts the excitation current of the electromagnet 231, thereby generating a variable electromagnetic force to levitate the permanent magnet combination module 3 to a specified height.

[0049] The main control module 1 measures the output signal of the measurement module 4 through the ADC module 42, including a displacement sensor and optionally installed current sensors, air pressure sensors, temperature sensors, humidity sensors, etc., so as to obtain environmental parameters such as the displacement of the permanent magnet combination module 3, the excitation current of the electromagnet 231, and the air pressure, temperature, humidity, etc. inside the reaction chamber 20. The drive module 2 is connected to the main control module 1 through the SPI protocol, and the drive module 2 uses a broadband, high-output current power amplifier to provide sufficient power to drive the coil load of the permanent magnet 31, and generates an electromagnetic force by adjusting the excitation current of the electromagnet 231, so that the sample to be measured is stably suspended under the action of the electromagnetic force.

[0050] Thus, the main control module 1 outputs data through the displacement sensor 411, calculates the vertical position or multi-degree-of-freedom displacement where the electromagnet combination module 23 is located, and independently, precisely, and continuously adjusts the excitation current of one or more electromagnets 231 in the electromagnet combination module 23, thereby generating a corresponding magnetic force to stably suspend the permanent magnet 31 at a given position, so as to realize the suspension control from a single-actuator magnetic levitation balance to a multi-actuator magnetic levitation balance.

[0051] Further, please refer to Figure 1 As shown, the modular magnetic levitation balance system further includes a human-computer interaction module 6, and the human-computer interaction module 6 is communicatively connected to the main control module 1 through the I 2 C protocol and RGB. As an optimized manner of this embodiment, the human-computer interaction module 6 is a touch display screen.

[0052] Thus, the main control module 1 enables the human-computer interaction module 6 to display the system parameters of the magnetic levitation balance in real time and obtain inputs through the I 2 C protocol and RGB888 interface, and communicates with the host computer through a serial port, a network port or Bluetooth to realize human-computer interaction.

[0053] Further, please refer to Figure 1 As shown, the measurement sensor combination module 41 is a combination of one or more displacement sensors 411, the electromagnet combination module 23 is a combination of one or more electromagnets 231, the permanent magnet combination module 3 is a combination of one or more permanent magnets 31, and the power amplifier combination module 22 is a combination of one or more power amplifiers 221, and the number of power amplifiers 221 is equal to the number of electromagnets 231.

[0054] Specifically, the electromagnet combination module 23 is a combination of one electromagnet 231 or multiple electromagnets 231. Correspondingly, the permanent magnet combination module 3 includes a combination of one permanent magnet 31 or multiple permanent magnets 31, constituting a single-actuator magnetic levitation balance or a multi-actuator magnetic levitation balance.

[0055] Please refer to Figure 2As shown, in some preferred embodiments, the displacement sensor 411 is a Hall displacement sensor, and at this time, the Hall displacement sensor is located directly above the permanent magnet combination module 3.

[0056] Please refer to Figure 3 As shown, in some other preferred embodiments, the displacement sensor 411 is a differential transformer displacement sensor, and at this time, the differential transformer displacement sensor is located in the middle of the permanent magnet combination module 3.

[0057] Please refer to Figure 4 As shown, in still some other preferred embodiments, the displacement sensor 411 is any one of an eddy current displacement sensor and a laser displacement sensor, and at this time, the eddy current displacement sensor or the laser displacement sensor is installed at the bottom of the permanent magnet combination module 3.

[0058] Figures 2 - 4 The figure shows the installation methods of different displacement sensors 411, such as being installed at the bottom, middle, and top of the permanent magnet combination module 3. The corresponding types of the displacement sensors 411 are eddy current (or laser) displacement sensors, differential transformer displacement sensors, and Hall (or laser) displacement sensors.

[0059] Therefore, the displacement sensor 411 is a single displacement sensor or a combination of multiple displacement sensors, and its type is a Hall sensor, a laser displacement sensor, an eddy current displacement sensor, or a differential transformer displacement sensor. Through a certain displacement sensor setting method, multi-degree-of-freedom displacement measurement of the permanent magnet combination module 3 is achieved, or a complementary effect is achieved to adapt to different displacement measurement ranges, or a differential effect is achieved to eliminate data drift during long-term measurement.

[0060] Please refer to Figure 5 、 6 As shown, based on the modular magnetic levitation balance system of this embodiment, a magnetic levitation balance with this modular magnetic levitation balance system is designed. At this time, the magnetic levitation balance includes a balance main body housing 10, a reaction chamber 20, a magnetic levitation actuator structure, a sample basket 30, and a touch display screen 60, where:

[0061] The balance main body housing 10 serves as the main structure of the magnetic levitation actuator structure. On the one hand, it ensures that the internal measurement is not disturbed by the outside world. On the other hand, it also serves as the installation and support carrier for the reaction chamber 20, the magnetic levitation actuator structure, the sample basket 30, and the touch display screen 60. The reaction chamber 20 is arranged inside the balance main body housing 10, and the reaction chamber 20 is airtight and has a sample access window. The magnetic levitation actuator structure includes an electromagnet combination module 23 and a permanent magnet combination module 3 located inside the reaction chamber 20. The electromagnet combination module 23 is coaxially arranged vertically above the permanent magnet combination module 3, and its top is connected to the inner top of the reaction chamber 20 and the balance main body housing 10. The sample basket 30 is vertically connected to the electromagnet combination module 23 through a hook 40. The touch display screen 60 is installed on the top of the balance main body housing 10.

[0062] Please refer to Figure 5 and Figure 6 As shown, the output signals of multiple sensors are measured through the ADC module 42, including the displacement sensor 411 and optionally installed current sensors, pressure sensors, temperature sensors, humidity sensors, etc., so as to obtain environmental parameters such as mover displacement, electromagnet excitation current, and air pressure, temperature, and humidity inside the reaction chamber 20. The magnetic levitation balance demonstrates a magnetic levitation balance using a dual Hall sensor (the first Hall sensor 4111 and the second Hall sensor 4112) and a single actuator structure (a single electromagnet 231). The stator is connected to the sensitive element of the analytical balance, so as to measure the sample mass through the analytical balance (or directly connected to the top plate to calculate the mass of the sample to be measured through the excitation current of the electromagnet). The resolution of the analytical balance should reach 0.1 mg or above to ensure the measurement accuracy of the magnetic levitation balance.

[0063] Furthermore, please refer to Figure 6 As shown, the balance main body housing 10 includes a frame top plate 11, frame side plates 12, an adapter plate 13, and a vibration isolation platform 14. The frame side plates 12 are vertically supported and connected to both sides of the frame top plate 11. The vibration isolation platform 14 is located directly below the frame top plate 11 and the frame side plates 12, and the frame side plates 12 are connected to the vibration isolation platform 14 through the adapter plate 13.

[0064] The screw 232 is vertically arranged. The electromagnet 231 is connected to the bottom end of the screw 232. The top end of the screw 232 passes through the reaction chamber 20 and is connected to the balance main body housing 10. The displacement sensor 411 is adapted to measure the suspension height of the permanent magnet combination module 3. The permanent magnet 31 is connected to the top end of the mover rod 32, and the permanent magnet 31 is installed inside the permanent magnet seat 33. The end of the mover rod 32 far from the permanent magnet 31 is connected to the hook 40.

[0065] Thus, a support frame is built by the frame top plate 11 and two frame side plates 12 for installing the reaction chamber 20. To prevent the magnetic levitation actuator structure from being affected by external vibrations during the measurement, a vibration isolation platform 14 is installed at the bottom of the reaction chamber 20 through an adapter plate 13 to ensure the accuracy of the measurement.

[0066] The electromagnet 231 is connected to the touch display screen 60 through a screw 232, and the mass of the sample to be measured is directly measured using an analytical balance, or directly connected to the frame top plate 11, and the mass of the sample to be measured is calculated by using the excitation current of the electromagnet.

[0067] Furthermore, please refer to Figure 5 、 6 As shown, the magnetic levitation balance further includes a support structure 50 located in the reaction chamber 20. The support structure 50 includes a support rod 501 and a support platform 502. The support platform 502 includes an upper support plate 5021 for supporting and connecting the displacement sensor 411 and a lower support plate 5022 for supporting and connecting the mover rod 32. The support rod 501 includes a first screw 5011 and a second screw 5012 connected vertically. One end of the first screw 5011 is connected to the upper support plate 5021, and the other end is connected to the frame top plate 11. One end of the second screw 5012 is connected to the upper support plate 5021, and the other end is connected to the lower support plate 5022.

[0068] Thus, the upper support plate 5021 is used to install the displacement sensor 411, and the lower support plate 5022 is used for the mover rod 32 to realize the installation and support of the permanent magnet combination module 3.

[0069] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various changes and modifications, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A modular magnetic suspension balance system, characterized in that: include: Main control module (1); A driving module (2), comprising a DAC module (21), a power amplifier assembly module (22) electrically connected to the DAC module (21), and an electromagnet assembly module (23) arranged corresponding to the power amplifier assembly module (22), wherein the DAC module (21) communicates with the main control module (1) using an SPI protocol; A permanent magnet assembly module (3) arranged correspondingly to the electromagnet assembly module (23); A measuring module (4), comprising a measuring sensor combination module (41) and an ADC module (42) electrically connected to the measuring sensor combination module (41), wherein the ADC module (42) communicates with the main control module (1) using an SPI protocol; The communication module (5) comprises a serial communication port, a network port and a Bluetooth communication port which are integrated together, and the communication module (5) is communicatively connected with the main control module (1).

2. The modular magnetic suspension balance system according to claim 1, characterized in that: It also includes a human-computer interaction module (6), wherein the human-computer interaction module (6) is connected to the computer via I 2 C protocol and RGB are communicatively connected with the main control module (1).

3. The modular magnetic suspension balance system according to claim 2, characterized in that: The human-computer interaction module (6) is a touch display screen.

4. The modular magnetic suspension balance system according to claim 1, characterized in that: The measurement sensor combination module (41) is one or more combinations of a displacement sensor, a current sensor, an air pressure sensor, a temperature sensor and a humidity sensor.

5. The modular magnetic suspension balance system according to claim 1, characterized in that: The electromagnet combination module (23) is a combination of one or more electromagnets.

6. The modular magnetic suspension balance system according to claim 1, characterized in that: The permanent magnet combination module (3) is a combination of one or more permanent magnets.

7. The modular magnetic suspension balance system according to claim 4, characterized in that: The displacement sensor is a Hall displacement sensor, and the Hall displacement sensor is located directly above the permanent magnet combination module (3).

8. The modular magnetic suspension balance system according to claim 4, characterized in that: The displacement sensor is a differential transformer type displacement sensor, and the differential transformer type displacement sensor is located in the middle of the permanent magnet combination module (3).

9. The modular magnetic suspension balance system according to claim 4, characterized in that: The displacement sensor is any one of an eddy current displacement sensor and a laser displacement sensor, and the eddy current displacement sensor or the laser displacement sensor is installed at the bottom of the permanent magnet combination module (3).

10. The modular magnetic suspension balance system according to claim 1, characterized in that: The power amplifier combination module (22) is a combination of one or more power amplifiers, and the number of the power amplifiers is equal to the number of the electromagnets.

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