LU500573A1

LU500573A1 - Device for detecting rotation angle of valve and related apparatus

Info

Publication number: LU500573A1
Application number: LU500573A
Authority: LU
Inventors: Fajun Sun
Original assignee: Joyo Science And Tech Co Ltd
Priority date: 2020-08-17
Filing date: 2021-07-28
Publication date: 2022-02-22
Also published as: WO2022037377A1; LU500573B1

Abstract

The present disclosure relates to a device for detecting the rotation angle of a valve and a related apparatus thereof. The device for detecting the rotation angle of a valve comprises a detected component, a sensor component provided corresponding to the detected component and a controller connected with the sensor component; wherein the detected component is provided on the gear of a gear motor; the gear motor is used for driving the valve to rotate; the sensor component is provided on the shell of the gear motor and used for enabling the controller to obtain a pulse signal whenever the detected component is detected in a preset detection area; the controller is used for determining the rotation angle of the valve based on the number of acquired pulse signals, and then accurately adjusting the rotation angle of the valve based on a preset reduction ratio. Compared with the traditional adjustment method, the error is small, and the accuracy is high, so that the device has high practicability.

Description

DEVICE FOR DETECTING ROTATION ANGLE OF VALVE AND RELATED HUS00573

APPARATUS THEREOF TECHNICAL FIELD

[01] The present disclosure relates to the technical field of fluid flow control, in particular to a device for detecting the rotation angle of a valve and a related apparatus thereof.

BACKGROUND

[02] In the process of fluid transmission, such as water supply, gas supply and oil supply in daily life or work, it is necessary to adjust the fluid flow through a valve (such as a ball valve).

At present, the common way is to control the gear motor to drive the valve to rotate based on time. In the adjustment process, it is necessary to acquire the angle of the valve in real time, so as to rotate the valve to a specified angle and obtain the specified flow.

[03] However, in the valve adjustment methods of the related art, the adjustment angle error is very large in some working environments, and the requirements of users cannot be met.

SUMMARY

[04] The present disclosure provides a device for detecting the rotation angle of a valve and a related apparatus thereof, which are used for solving the problem that in the valve adjustment methods of the related art, the adjustment angle error is very large in some working environments, and the requirements of users cannot be met.

[05] The above purpose of the present disclosure is achieved by the following technical scheme.

[06] In a first aspect, the present disclosure provides a device for detecting the rotation angle of a valve, comprising: a detected component, a sensor component provided corresponding to the detected component, and a controller connected with the sensor component; wherein

[07] the detected component is provided on the gear of a gear motor; the gear motor is used for driving the valve to rotate;

[08] the sensor component is provided on the shell of the gear motor and used for enabling the controller to obtain a pulse signal whenever the detected component is detected in a preset detection area; HUS00573

[09] the controller is used for determining the rotation angle of the valve based on the number of acquired pulse signals.

[10] Preferably, the detected component is provided at the outer edge of the gear of the gear motor.

[11] Preferably, the gear of the gear motor comprises a reduction gear and a synchronous gear or a coaxial gear provided on the reduction gear, and the detected component is provided on the synchronous gear or the coaxial gear.

[12] Preferably, the gear of the gear motor comprises multi-stage reduction gears, and the detected component is provided on any stage of reduction gears.

[13] Preferably, the gear is made of non-conductive material, the detected component is made of conductive material, and the sensor component comprises an LC oscillation circuit and an oscillation sensor for detecting sine waves in the LC oscillation circuit.

[14] Preferably, the number of the sensor components is two.

[15] Preferably, the detected component is made of magnetic material, and the sensor component comprises a Hall switch.

[16] Preferably, the detected component is magnetic steel.

[17] In a second aspect, the present disclosure further provides a gear motor system, comprising the gear motor described above and a corresponding device for detecting the rotation angle of a valve.

[18] In a third aspect, the present disclosure further provides a valve system, comprising the valve and the gear motor system described above.

[19] The technical scheme provided by the embodiment of the present disclosure can include the following beneficial effects.

[20] In the technical scheme provided by the embodiment of the present disclosure, the detected component is provided on the gear of the gear motor, and the sensor component and the controller connected with the sensor component are provided at the corresponding position of the shell of the gear motor, so that whether the detected component appears in the preset detection area can be detected by the sensor component. When the detected component is detected, the controller can obtain a pulse signal, so that the controller can determine the rotation number of the gear where the detected component is located according to the number of the acquired pulse 9 signals, and then accurately adjust the rotation angle of the valve based on the preset reduction ratio. Compared with the traditional adjustment method, the error is small, and the accuracy is high, so that the device has high practicability.

[01] It should be understood that the above general description and the following detailed description are only exemplary and illustrative, rather than limit the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

[01] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure together with the specification.

[02] FIG. 1 is a schematic diagram illustrating an arrangement position of a detected component in a device for detecting the rotation angle of a valve according to an embodiment of the present disclosure;

[03] FIG. 2 is a schematic diagram illustrating the connection relationship of circuit components in a device for detecting the rotation angle of a valve according to an embodiment of the present disclosure;

[04] FIG. 3 is a schematic diagram illustrating another arrangement position of a detected component in a device for detecting the rotation angle of a valve according to an embodiment of the present disclosure;

[05] FIG. 4 is a schematic diagram illustrating the basic principle of an LC oscillating circuit;

[06] FIG. 5 is a specific structural schematic diagram illustrating a device for detecting the rotation angle of a valve according to an embodiment of the present disclosure;

[07] FIG. 6 is a schematic diagram illustrating the working principle of a device for detecting the rotation angle of a valve according to an embodiment of the present disclosure;

[08] FIG. 7 is a working principle diagram of a Hall switch;

[09] FIG. 8 is a structural schematic diagram illustrating a gear motor system according to an embodiment of the present disclosure;

[10] FIG. 9 is a structural schematic diagram illustrating a valve system according to an embodiment of the present disclosure.

LU5S00573

DETAILED DESCRIPTION OF THE EMBODIMENTS

[11] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings refer to the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[12] Inthe above adjustment method of controlling the gear motor to drive the valve to rotate based on time, the basic principle is to determine the total number of revolutions of the rotor based on the rotation speed and running time of the motor rotor, and then calculate the rotation angle of the driven valve (the gear coaxial with the valve is directly driven) based on the reduction ratio of the gear motor (a transmission ratio), where the reduction ratio is a transmission ratio, which is generally expressed in the form of X:1, for example, 360:1 means that when the motor gear rotates for 360 revolutions, the driven gear rotates for one revolution. In this way, under different working environments, different degrees of errors will occur. For example, when the motor voltage fluctuates, the rotation speed of the motor will fluctuate, so that the rotation speed of the motor is not a fixed value, which will lead to errors in the total number of revolutions of the rotor. For example, different liquid flow rates will cause different resistance to the valve, even if the time during which the same voltage drives the valve to be on/off for one time is different, so that the valve will eventually rotate out of place or exceed the target position, that is, accurate adjustment cannot be achieved.

[13] In order to solve the problem in the related art that the rotation angle of the valve cannot be accurately adjusted, the present disclosure provides a device for detecting the rotation angle of a valve, and a gear motor system and a valve system comprising the device. The following will be explained in detail by embodiments.

[14] Embodiment 1

[15] With reference to FIGS. 1-2, FIG. 1 is a schematic diagram illustrating an arrangement position of a detected component in a device for detecting the rotation angle of a valve according to an embodiment of the present disclosure. FIG. 2 is a schematic diagram illustrating the connection relationship of circuit components in a device for detecting the rotation angle of a valve according to an embodiment of the present disclosure.

[16] As shown in FIGS. 1-2, the device comprises a detected component 1, a sensor 5 component 2 provided corresponding to the detected component 1, and a controller 3 connected with the sensor component 2 (compared with the structure shown in FIG. 1, the sensor component 2 is provided outside the paper surface, so that it is shown in FIG. 1); wherein the detected component 1 is provided on the gear of the gear motor; the gear motor is used for driving the valve to rotate; the sensor component 2 is provided on the shell of the gear motor (the shell is not shown in the figure), and is used for enabling the controller 3 to obtain a pulse signal whenever the detected component! is detected in a preset detection area; the controller 3 is used for determining the rotation angle of the valve based on the number of acquired pulse signals.

[17] First, it should be noted that power is transmitted between the reducer motor and the valve through a plurality of gears. The driving gear 4 connected or meshed with the output shaft of the reducer motor obtains power from the output shaft of the motor, and then directly or indirectly transmits the power to the driven gear 5 coaxial with the valve, thereby driving the valve to rotate. In addition, the driven gear 5 can also be connected with the pointer on the dial of the valve, so as to drive the pointer to rotate and visually indicate the current angle of the valve through the pointer.

[18] In this embodiment, the detected component 1 provided on the gear of the gear motor will move circularly along with the rotation of the gear, and will be detected by the sensor component 2 when it moves to the preset detection area, but will not be detected by the sensor component 2 when it moves to other areas. Therefore, when the sensor component 2 detects the detected component 1 twice, it indicates that the gear rotates once, and at this time, the controller 3 obtains two pulse signals. Based on this, with the continuous rotation of the gear where the detected component 1 is located, the controller 3 can continuously obtain pulse signals and determine the total rotation number of the gear where the detected component 1 is located according to the cumulative number of acquired pulse signals. Then, the controller 3 calculates the rotation angle of the driven gear 5 based on the rotation number of the gear where the detected component 1 is located according to the reduction ratio of the gear where the detected component 1 is located and the driven gear 5, that is, determines the rotation angle of the valve 7 and then controls the motor to stop working when the valve is determined to rotate to the target angle, realizing the accurate control of the rotation angle of the valve. The controller 3 can be an EFM32 series or similar single chip microcomputer.

[19] In addition, in specific implementation, the detected component 1 is preferably provided on the outer edge of the gear of the gear motor, for example, in one of the teeth as shown in FIG.

1. In this manner, one the one hand, it is convenient for providing, and on the other hand, because the sensor component 2 itself has a certain detection range, the detected component 1 cannot be detected when it exceeds the detection range, so that it is convenient to find a suitable position to provide the sensor component 2 when the detected component 1 is provided on the outer edge of the gear motor. In addition, when the sensor component 2 is provided on the shell of the gear motor, it can be directly fixed on the shell by means of connection such as screws, or it can be indirectly provided on the shell by a structure such as a provided support.

[20] Further, considering practical application, it may be inconvenient to directly provide the detected component 1 on the original gear of the motor. In this case, the synchronous or coaxial gear can be provided on the original reduction gear of the gear motor, and then the detected component 1 can be provided on the synchronous or coaxial gear. For example, when the original reduction gear has a small area and its own space is insufficient to provide the detected component 1, a synchronous or coaxial gear with larger area coaxial with the original reduction gear can be provided, and then the detected component 1 can be provided on the synchronous or coaxial gear. For another example, when there are other interference signals in the motor, which may lead to false detection of the sensor component 2, a synchronous gear coaxial with the original reduction gear can be provided, and then the detected component 1 can be provided on the synchronous gear, so that the detected component 1 and the sensor component 2 can avoid the position of interference signals.

[21] In addition, it should be noted that the gears of the gear motor generally comprises multi-stage reduction gears. The rotation speed of the driven gear 5 can be controlled in an appropriate range by setting the transmission ratio of the multi-stage reduction gears. In the scheme of the present disclosure, it can be achieved by providing the detected component 1 at any stage of reduction gears (the transmission ratio of each stage of gears can be preset to determine the required control accuracy, and the closer the installed detected component 1 is 20909 the gear at the motor side, the higher the angle accuracy of the control valve). For example, as shown in FIG. 3, the detected component 1 can be provided on the middle transmission gear 6. It should only be noted that, in practice, the detected component 1 may not just be located in the preset detection area of the sensor component 2 at the moment when the motor is started, but will be detected by the sensor component 2 for the first time after moving for a certain distance, which is equivalent to the fact that when the sensor component 2 detects that the gear where the detected component 1 is located rotates for one revolution, the gear actually rotates for more than one revolution (but less than two revolutions). That is, there are some errors in the scheme of the present disclosure in theory, but the errors will decrease with the increase of the reduction ratio between the gear where the detected component 1 is located and the driven gear 5. Based on this, in specific implementation, in order to achieve greater positioning accuracy, the detected component 1 should be provided on the reduction gear with a relatively larger reduction ratio as much as possible.

[22] In the scheme described in the above embodiment of the present disclosure, the detected component 1 is provided on the gear of the gear motor, and the sensor component 2 and the controller 3 connected with the sensor component 2 are provided at the corresponding position of the shell of the gear motor, so that whether the detected component 1 appears in the preset detection area can be detected by the sensor component 2. When the detected component 1 is detected, the controller 3 can obtain a pulse signal, so that the controller 3 can determine the rotation number of the gear where the detected component 1 is located according to the number of the acquired pulse signals, and then accurately adjust the rotation angle of the valve based on the preset reduction ratio. Compared with the traditional adjustment method, the error is small, and the accuracy 1s high, so that the device has high practicability.

[23] The embodiment 1 explains the overall situation of the scheme of the present disclosure. In order to make the scheme of the present disclosure clearer, the corresponding implementation process will be explained by two specific examples hereinafter.

[24] Embodiment 2

[25] The scheme of this embodiment is realized based on an LC oscillation circuit, specifically by detecting sine waves at both ends of the capacitor C.

[26] With reference to FIG. 4, the basic principle of the LC oscillating circuit will be >" explained first. The LC oscillating circuit comprises power supply €, a capacitor C, an inductor L and a switch K, as shown in FIG. 4. First, the right contact of the switch K is closed. The power supply e and the capacitor C form a path. The power supply € a charges the capacitor C, and then the left contact of the switch K is closed. At this time, the capacitor C and the inductor L form a path. The capacitor C discharges. Because the inductor L consumes electric energy, both sides of the capacitor C will present a gradually decaying sine wave output.

[27] Based on the above principle, a detected component 1 made of conductive material (e.g., an iron sheet) can be provided in a gear made of non-conductive material (e.g., plastic). A sensor component 2 including an LC oscillation circuit and an oscillation sensor can be provided at the same time, wherein the inductance coil in the LC oscillating circuit is provided at the corresponding position of the detected component 1.

[28] For better understanding, it will be explained with reference to FIG. 5. In the structure shown in FIG. 5, the disc is a gear, the dark area of the disc is the detected component 1 made of conductive material, and the white area is made of non-conductive material. The inductor L is provided above the disc. The inductor L is connected with the capacitor C and the oscillation sensor (LE Sensor (Low Energer Sensor) in FIG. 5). The capacitor C is connected with a power supply (power supply not shown). In this way, when the detected component 1 rotates below the inductor 1, because there is a changing magnetic field in the vicinity of the inductor L and the detected component 1 is made of conductive material, eddy currents will be generated in the detected component 1 due to electromagnetic induction. When eddy currents are generated, electric energy will be consumed, resulting in accelerated attenuation of the sine waves (as shown by the upper sine wave in FIG. 6). However, when the non-conductive material part of the gear rotates below the inductance L, no eddy current will be generated, so that the attenuation speed of the sine wave is basically unchanged (as shown by the lower sine wave in FIG. 6). Based on the above principle, by detecting the attenuation speed of the sine wave at both ends of the capacitor C, the position of the detected component 1 can be accurately identified, and then the rotation number of the gear can be determined.

[29] In addition, it should be noted that in this embodiment, when only one group of sensor components 2 are provided, only the rotation number of the gear can be determined, but the rotation direction of the gear cannot be determined. In order to determine the rotation direction of the gear, two groups of sensor components 2 can be provided as shown in FIG. 5, wherein the inductance coils of the two groups of sensor components 2 are provided at a certain distance. The rotation direction of the gear can be determined by comprehensively considering sine waves acquired by the two groups of sensor components 2.

[30] In specific implementation, the oscillation sensor and the controller 3 can be integrated products. For example, two oscillation sensors with low power consumption are integrated in the single chip microcomputer of EFM32 series shown in FIG. 5.

[31] Embodiment 3

[32] The scheme of this embodiment is realized based on the Hall effect. Specifically, it is realized by detecting the surrounding magnetic parts through a Hall switch.

[33] First, the Hall effect is explained. When the current passes through the semiconductor perpendicular to the external magnetic field, the carrier deflects, and an additional electric field is generated in the direction perpendicular to the current and magnetic field, resulting in a potential difference between both ends of the semiconductor. This phenomenon is referred to as the Hall effect, and this potential difference is also referred to as the Hall potential difference.

[34] A Hall element is a switching element based on the Hall effect. When magnetic objects move close to the Hall switch, the Hall element on the detection surface of switch changes the internal circuit state of the switch due to the Hall effect, thus recognizing the existence of magnetic objects nearby, and then controlling the on/off of the switch. FIG. 7 shows a circuit schematic diagram of a Hall switch.

[35] Based on the above principle, the detected component 1 made of magnetic material, such as magnetic steel, can be provided in the gear made of non-magnetic material, and then the Hall switch can be provided at the corresponding position as the sensor component 2. In this way, when the detected component 1 rotates to the detection area of the Hall switch, the internal circuit of the Hall switch will change, which is equivalent to detecting the detected component 1 once. Based on the above principle, the controller 3 can determine the rotation number of the gear according to the number of times the detected component 1 is detected.

[36] In specific implementation, the model of the Hall switch can be selected according to the actual situation. For example, a feasible model is MRS201.

[37] With the above scheme, the present disclosure can accurately determine the rotation number of the gear where the detected component 1 is located, and then calculate the rotation angle of the driven gear 5, thus realizing accurate control of the valve.

[38] In addition, based on the device described above, as shown in FIG. 8, the present disclosure further provides a corresponding gear motor system, which comprises the gear motor described above and a corresponding device for detecting the rotation angle of a valve.

[39] In addition, based on the gear motor system described above, as shown in FIG. 9, the present disclosure further provides a corresponding valve system, which comprises the valve and the gear motor system described above.

[40] In the scheme described in the present disclosure, the detected component 1 is provided on the gear of the gear motor, and the sensor component 2 and the controller 3 connected with the sensor component 2 are provided at the corresponding position of the shell of the gear motor, so that whether the detected component 1 appears in the preset detection area can be detected by the sensor component 2. When the detected component 1 is detected, the controller 3 can obtain a pulse signal, so that the controller 3 can determine the rotation number of the gear where the detected component 1 is located according to the number of the acquired pulse signals, and then accurately adjust the rotation angle of the valve based on the preset reduction ratio. Compared with the traditional adjustment method, the error is small, and the accuracy is high, so that the device has high practicability.

[41] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[42] In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that specific features, structures, materials or characteristics described in connection with this embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[43] Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limitations of the present disclosure, and those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

Claims LU5S00573

1. A device for detecting the rotation angle of a valve, comprising: a detected component, a sensor component provided corresponding to the detected component, and a controller connected with the sensor component; wherein the detected component is provided on the gear of a gear motor; the gear motor is used for driving the valve to rotate; the sensor component is provided on the shell of the gear motor and used for enabling the controller to obtain a pulse signal whenever the detected component is detected in a preset detection area: the controller is used for determining the rotation angle of the valve based on the number of acquired pulse signals.

2. The device according to claim 1, wherein the detected component is provided at the outer edge of the gear of the gear motor.

3. The device according to claim 1, wherein the gear of the gear motor comprises a reduction gear and a synchronous gear or a coaxial gear provided on the reduction gear, and the detected component is provided on the synchronous gear or the coaxial gear.

4. The device according to claim 1, wherein the gear of the gear motor comprises multi-stage reduction gears, and the detected component is provided on any stage of reduction gears.

5. The device according to any of claims 1-4, wherein the gear is made of non-conductive material, the detected component is made of conductive material, and the sensor component comprises an LC oscillation circuit and an oscillation sensor for detecting sine waves in the LC oscillation circuit.

6. The device according to claim 5, wherein the number of the sensor components is two.

7. The device according to any of claims 1-4, wherein the detected component is made of magnetic material, and the sensor component comprises a Hall switch.

8. The device according to claim 7, wherein the detected component is magnetic steel.

9. A gear motor system, comprising the gear motor according to any one of claims 1-8 and a corresponding device for detecting the rotation angle of a valve.

10. À valve system, comprising the valve and the gear motor system according to claim 9.