Actuator position acquisition device

Abstract

The utility model relates to the technical field of actuator position monitoring, in particular to an actuator position acquisition device, which comprises an output shaft synchronously rotating with an actuator, and a magnet is fixed at the top of the output shaft. The encoder is used for collecting corner position information of the output shaft by inducing magnetic field changes, the controller is used for receiving and processing the information collected by the encoder, and the encoder is located over the magnet. According to the actuator position collecting device, the real-time position of the actuator is obtained through Hall induction magnetic field changes, the collecting device and a moving part are not in contact, abrasion is avoided, the magnet and the encoder are not prone to being affected by temperature, humidity and vibration, and the precision and stability of signal collecting can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of actuator position monitoring technology, and in particular to an actuator position acquisition device. Background Technology

[0002] In industrial automation, intelligent control systems, and many other fields involving mechanical motion control, actuators play a crucial role. Accurate acquisition and control of their position is key to ensuring stable and efficient system operation. Currently, actuator position acquisition technology faces numerous challenges in practical applications, especially traditional potentiometer-based position acquisition methods, which are struggling to meet the ever-increasing precision, stability, and reliability requirements of modern industry.

[0003] Traditional actuator position acquisition typically relies on potentiometers. A potentiometer works by sliding brushes across a resistive element, converting mechanical displacement into a change in resistance, and thus measuring the actuator's position. However, this method has significant limitations.

[0004] Limited accuracy: Potentiometers typically have relatively low accuracy, with linearity generally around 1%. Even high-quality potentiometers can only achieve a linearity of 0.5%.

[0005] Poor stability: The resistance of a potentiometer is affected by various environmental factors, such as temperature, humidity, and vibration, which can cause changes in its resistance and thus affect the accuracy of position measurement. In high-temperature and humid industrial environments, the performance of the potentiometer will degrade significantly, leading to errors in actuator position acquisition and affecting the normal operation of the system.

[0006] Short lifespan: Friction between the brushes and resistive elements is unavoidable during the use of a potentiometer. Especially with prolonged use or frequent adjustments, this friction leads to wear and tear on both the brushes and resistive elements, causing a gradual decline in the potentiometer's performance and even malfunction. This not only increases equipment maintenance costs and downtime but may also affect the continuity and stability of production.

[0007] With the rapid development of technology and the continuous improvement of industrial automation, the requirements for the accuracy, stability, and reliability of actuator position acquisition devices are becoming increasingly stringent. To meet these growing demands, there is an urgent need to develop a new type of actuator position acquisition device to overcome the shortcomings of traditional potentiometer-based acquisition methods and improve the overall performance and application value of actuators. Utility Model Content

[0008] This invention proposes an actuator position acquisition device, which uses Hall effect sensing magnetic field changes to obtain the position of moving parts in real time, solving the problems of limited accuracy, stability and reliability that are difficult to solve due to structural limitations in the prior art.

[0009] The technical solution adopted by this utility model to solve its technical problem is: an actuator position acquisition device, including an output shaft that rotates synchronously with the actuator, a magnet fixed on the top of the output shaft, an encoder that acquires the rotation angle position information of the output shaft by sensing changes in the magnetic field, and a controller that receives and processes the information acquired by the encoder, the encoder being located directly above the magnet.

[0010] Preferably, the output shaft is a hollow shaft, and a magnet sleeve is inserted into its top, with the magnet embedded in the top of the magnet sleeve.

[0011] Preferably, the magnet is disc-shaped or cylindrical, and the magnet is coaxial with the output shaft.

[0012] Preferably, the encoder includes a Hall effect sensor, and the gap between the encoder and the magnet is less than 5 mm.

[0013] Preferably, the output shaft is disposed inside the gearbox, the gearbox is fixed inside the lower housing, and the lower end of the output shaft passes through the gearbox and is rotatably connected to the lower housing.

[0014] Preferably, the gearbox is provided with a drive shaft, a first synchronous pulley is coaxially fixed to the output shaft, a second synchronous pulley is coaxially fixed to the drive shaft, the first synchronous pulley and the second synchronous pulley mesh, and the first synchronous pulley and the second synchronous pulley have the same number of teeth.

[0015] Preferably, a scale is provided on the top of the drive shaft, and a pointer pointing to the scale is fixed on the support of the gearbox.

[0016] Preferably, the first synchronous pulley is fixed to the output shaft by a flat square fitting, and the second synchronous pulley is connected to the transmission shaft by a spline.

[0017] The beneficial effects of this utility model are as follows: An actuator position acquisition device includes an output shaft that rotates synchronously with the actuator. A magnet is fixed to the top of the output shaft. An encoder that acquires the angular position information of the output shaft by sensing changes in the magnetic field is also provided, along with a controller that receives and processes the information acquired by the encoder. The encoder is located directly above the magnet. This actuator position acquisition device obtains the real-time position of the actuator by sensing changes in the Hall effect magnetic field. Since the acquisition device and the moving parts are not in contact, there is no wear. Furthermore, the magnet and the encoder are not easily affected by temperature, humidity, and vibration, ensuring the accuracy and stability of the signal acquisition. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an actuator position acquisition device according to the present invention;

[0019] Figure 2 for Figure 1 Main sectional view;

[0020] Figure 3 This is a three-dimensional structural diagram of an actuator position acquisition device with a reduction gearbox and a lower body box according to the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Lower housing, 2-Reduction gearbox, 3-Controller, 4-Output shaft, 5-Synchronous gear one, 6-Magnet, 7-Encoder, 8-Synchronous gear two, 9-Drive shaft, 10-Dial, 11-Pointer. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the present invention.

[0024] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1.

[0026] Reference Figures 1-3In this embodiment, a reduction gearbox 2 is fixed inside the lower housing 1. The reduction gearbox 2 contains numerous gear mechanisms for power transmission and deceleration. The input shaft, also known as the output shaft 4, of the reduction gearbox 2 passes through the reduction gearbox 2 at its lower end and is rotatably connected to the lower housing 1 via bearings. It is also fixedly connected to the actuator's execution component via a key, allowing the output shaft 4 and the actuator's execution component to rotate synchronously. Based on this, this invention indirectly acquires the actuator's position information by detecting the rotation angle of the output shaft 4.

[0027] A magnet 6 is fixed to the top of the output shaft 4. The magnet 6 is disc-shaped or cylindrical and is coaxial with the output shaft 4. The left and right semicircles of the magnet 6 are N and S poles, respectively. When the magnet 6 rotates clockwise or counterclockwise with the output shaft 4, the N and S magnetic fields of the magnet 6 deflect, that is, the magnetic field changes. At this time, the encoder 7, which is set directly above the magnet 6, can sense the changing magnetic field signal through signal sensing points set at different positions on it, and obtain the magnetic field deflection angle through internal compilation, thereby obtaining the opening of the output shaft 4, that is, the position after the output shaft 4 has deflected by a certain number of degrees.

[0028] After the encoder 7 collects the position information of the output shaft 4, it sends it to the controller 3. The controller 3 processes the information and can then perform position control on the actuator.

[0029] To facilitate the installation and replacement of the magnet 6, the output shaft 4 is a hollow shaft with a magnet sleeve inserted into its top, and the magnet 6 is embedded in the top of the magnet sleeve.

[0030] Example 2.

[0031] The Hall effect sensor in Example 1 can collect actuator position information and control the actuator's motion state, but it is an electromagnetic signal and has no display, so the actuator's position information cannot be well observed.

[0032] This embodiment uses a scale pointer to intuitively display the position information of the actuator, which is implemented in the following way.

[0033] Inside the gearbox 2, a transmission shaft 9 parallel to the output shaft 4 is provided. A synchronous pulley 5 is coaxially fixed to the output shaft 4, and a synchronous pulley 8 is coaxially fixed to the transmission shaft 9. The synchronous pulley 5 and the synchronous pulley 8 mesh with each other, and the number of teeth of the synchronous pulley 5 and the synchronous pulley 8 are equal.

[0034] In this way, the transmission shaft 9 and the output shaft 4 can rotate synchronously at the same speed. A dial 10 is then installed on the top of the transmission shaft 9, and a pointer 11 pointing to the dial 10 is fixed to the support of the reduction gearbox 2. Thus, when the output shaft 4 rotates, the dial 10 also rotates synchronously by an equal angle, while the pointer 11 remains fixed, allowing for a direct observation of the rotation angle of the output shaft 4, thereby determining the actuator position.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, and for the convenience of describing the technical solution, the front, back, left, right, top, middle, and bottom orientations are based on the accompanying drawings and are not a limitation on the protection scope of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the essence and scope of the technical solution of this utility model.

Claims

1. An actuator position acquisition device, characterized in that: It includes an output shaft that rotates synchronously with the actuator, a magnet fixed to the top of the output shaft, an encoder that collects the rotational position information of the output shaft by sensing changes in the magnetic field, and a controller that receives and processes the information collected by the encoder. The encoder is located directly above the magnet.

2. The actuator position acquisition device according to claim 1, characterized in that: The output shaft is a hollow shaft, and a magnet sleeve is inserted into its top, with the magnet embedded in the top of the magnet sleeve.

3. The actuator position acquisition device according to claim 1, characterized in that: The magnet is disc-shaped or cylindrical, and the magnet is coaxial with the output shaft.

4. The actuator position acquisition device according to claim 1, characterized in that: The encoder includes a Hall effect sensor, and the gap between the encoder and the magnet is less than 5 mm.

5. The actuator position acquisition device according to claim 1, characterized in that: The output shaft is located inside the gearbox, which is fixed inside the lower housing. The lower end of the output shaft passes through the gearbox and is rotatably connected to the lower housing.

6. The actuator position acquisition device according to claim 5, characterized in that: The gearbox is equipped with a drive shaft, and a synchronous pulley one is coaxially fixed to the output shaft. A synchronous pulley two is coaxially fixed to the drive shaft. The synchronous pulley one and the synchronous pulley two mesh with each other, and the synchronous pulley one and the synchronous pulley two have the same number of teeth.

7. The actuator position acquisition device according to claim 6, characterized in that: A scale is provided on the top of the drive shaft, and a pointer pointing to the scale is fixed on the support of the gearbox.

8. The actuator position acquisition device according to claim 6, characterized in that: The first synchronous pulley is fixed to the output shaft by a flat square fitting, and the second synchronous pulley is connected to the transmission shaft by a spline.

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