A highly efficient and synchronous dual-redundancy magnetic angular displacement sensor

Abstract

The present invention discloses a highly efficient and synchronous dual-redundancy magnetic sensitive angular displacement sensor, wherein the housing and the cover plate are interconnected to form an installation inner cavity, the rotating shaft is installed in the installation inner cavity through the rotating shaft bearing, and two driven shafts are installed in the installation inner cavity through driven bearings, the circumferential outer walls of the two driven shafts are respectively provided with gear teeth, the circumferential outer wall of the middle section of the rotating shaft is provided with gear teeth, the two driven shafts are respectively connected to the rotating shaft through gear teeth meshing, two magnetic steel mounting parts are respectively connected to the two driven shafts and are respectively located on the symmetrical sides of the rotating shaft, and the two magnetic steels are respectively installed on the two magnetic steel mounting parts. The present invention drives two magnetic steels to rotate synchronously in the same direction through the same rotating shaft in a gear transmission manner, and the shapes, sizes, magnetic field strengths, magnetization directions, pole pairs, corresponding hardware circuit principles, and installation methods of the two magnetic steels are exactly the same, so the consistency and synchronization of the two output signals are extremely high, meeting the application requirements of highly synchronized output signals.

Description

Technical Field

[0001] The invention relates to a magnetic angular displacement sensor, in particular to a high-efficiency synchronous dual-redundancy magnetic angular displacement sensor. Background Art

[0002] A magnetic angular displacement sensor is an angular displacement sensor that detects the rotation angle of a rotating shaft by detecting the rotation angle of a magnet installed on the rotating shaft through a hardware circuit. A dual-redundancy magnetic angular displacement sensor is a magnetic angular displacement sensor that includes two magnets and two hardware circuits and can output two electrical signals. The purpose of using two magnets and two hardware circuits is that when one of the sensor signals fails, the user can collect the output data of the other channel to ensure the normal operation of the equipment, thus doubling its reliability.

[0003] One of the most important indicators of a dual-redundancy magnetic angular displacement sensor is the synchronization of its two output signals. When the main channel signal fails, the backup channel signal must take over the main channel signal and its output data must be consistent with the main channel. Therefore, it is necessary to try to ensure that the two output signals of the dual-redundancy magnetic angular displacement sensor are consistent to ensure their synchronization.

[0004] In the traditional dual-redundancy magnetic angular displacement sensor, the two magnets are directly installed on the rotating shaft. There are two main installation methods. One is to arrange the annular magnets of the same size axially and respectively mount them on the rotating shaft. The other is to mount a larger annular magnet on the rotating shaft and the other smaller magnet on the end of the rotating shaft. The former has the problem that the magnetic fields of the two magnets affect each other, resulting in inaccurate, inconsistent and difficult to synchronize the two output signals. The latter has the problem that the magnetic field strengths of the two magnets are different, resulting in inconsistent and difficult to synchronize the two output signals.

[0005] For example, the utility model patent with patent number "ZL 201921403174.7" discloses a coaxial dual-redundancy magnetic sensitive angular displacement sensor, including a shell, a shielding cover, a cover plate and a shaft. The shell is mainly composed of a containing shell and a bearing part. The containing shell has a containing cavity inside, and a shielding cover is installed at the bottom of the containing shell; the middle part of the shaft has a magnetic steel base mounting part, the upper part of the shaft cooperates with the bearing B in the bearing part, a hollow magnetic steel base is fixedly installed on the outside of the magnetic steel base mounting part, a hollow magnetic steel is installed on the bottom of the hollow magnetic steel base, and a hollow printed circuit board assembly is installed on the top of the shielding cover; the bottom end of the shaft is a positioning sleeve mounting part, the positioning sleeve mounting part passes through the shielding cover and is placed in the cover plate cavity of the cover plate, the positioning sleeve mounting part has a positioning sleeve fixedly installed on the outside, a solid magnetic steel is fixed on the bottom of the positioning sleeve, and a printed circuit board assembly is installed inside the cover plate.

[0006] The sizes of the two magnets in the above patent are completely different, and the corresponding magnetic field strengths are different. The two collected electrical signals are inconsistent and difficult to synchronize, which limits its application. Summary of the invention

[0007] The purpose of the present invention is to provide a highly efficient and synchronous dual-redundancy magnetic angular displacement sensor in order to solve the above problems.

[0008] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0009] A highly efficient and synchronous dual-redundant magnetic angular displacement sensor, comprising a housing, a cover plate, a rotating shaft, a first magnetic steel, a second magnetic steel, a first hardware circuit and a second hardware circuit, wherein the housing and the cover plate are connected to each other to form an installation cavity, the rotating shaft is installed in the installation cavity through a rotating shaft bearing, the first magnetic steel, the second magnetic steel, the first hardware circuit and the second hardware circuit are all installed in the installation cavity, and the first magnetic steel corresponds to the first hardware circuit, and the second magnetic steel corresponds to the second hardware circuit, the highly efficient and synchronous dual-redundant magnetic angular displacement sensor also comprises a first driven shaft, a second driven shaft, a first magnetic steel mounting member and a second magnetic steel mounting member, the first driven shaft is connected to the first driven shaft through the first driven shaft The bearing is installed in the installation inner cavity, the second driven shaft is installed in the installation inner cavity through the second driven bearing, gear teeth are respectively provided on the circumferential outer walls of the first driven shaft and the second driven shaft, and gear teeth are provided on the circumferential outer wall of the middle section of the rotating shaft, the first driven shaft and the rotating shaft, and the second driven shaft and the rotating shaft are respectively meshed and connected by gear teeth, the first magnetic steel mounting component is connected to the first driven shaft, and the second magnetic steel mounting component is connected to the second driven shaft, the first magnetic steel mounting component and the second magnetic steel mounting component are respectively located on two symmetrical sides of the rotating shaft, the first magnetic steel is mounted on the first magnetic steel mounting component, and the second magnetic steel is mounted on the second magnetic steel mounting component.

[0010] Preferably, in order to facilitate stable transmission while minimizing the occupied space, the high-efficiency synchronous dual-redundancy magnetic angular displacement sensor also includes a first transmission shaft and a second transmission shaft, the first driven shaft is provided with a center through hole and is sleeved on the outside of the first transmission shaft through the center through hole, the first magnetic steel mounting piece is connected to the first transmission shaft, the second driven shaft is provided with a center through hole and is sleeved on the outside of the second transmission shaft through the center through hole, and the second magnetic steel mounting piece is connected to the second transmission shaft.

[0011] Preferably, in order to eliminate the clearance error between the rotating shaft and the corresponding driven shaft during forward and reverse rotation, the high-efficiency synchronous dual-redundancy magnetic angular displacement sensor further includes a first anti-backlash gear, a second anti-backlash gear, a first anti-backlash retaining spring and a second anti-backlash retaining spring, wherein the first anti-backlash gear is sleeved on the first transmission shaft through its own central through hole and arranged in parallel with the first driven shaft, the first anti-backlash gear is meshed with the rotating shaft through gear teeth, and the two ends of the first anti-backlash retaining spring are respectively connected to the first anti-backlash gear and the first driven shaft and meet the following conditions: a gear on the rotating shaft The two sides of the tooth are respectively in close contact with the corresponding gear teeth on the first driven shaft and the corresponding gear teeth on the first anti-backlash gear; the second anti-backlash gear is mounted on the second transmission shaft through its own center through hole and is arranged in parallel with the second driven shaft, the second anti-backlash gear is connected to the rotating shaft through gear tooth meshing, and the two ends of the second anti-backlash retaining spring are respectively connected to the second anti-backlash gear and the second driven shaft and meet the following conditions: the two sides of a gear tooth on the rotating shaft are respectively in close contact with the corresponding gear teeth on the second driven shaft and the corresponding gear teeth on the second anti-backlash gear.

[0012] Preferably, in order to facilitate the installation of the anti-backlash retaining spring, the middle section of the first anti-backlash retaining spring is placed in the corresponding groove provided on the first anti-backlash gear, and the two ends of the first anti-backlash retaining spring are respectively placed in the connecting hole on the first anti-backlash gear and the connecting hole of the first driven shaft; the middle section of the second anti-backlash retaining spring is placed in the corresponding groove provided on the second anti-backlash gear, and the two ends of the second anti-backlash retaining spring are respectively placed in the connecting hole on the second anti-backlash gear and the connecting hole of the second driven shaft.

[0013] Preferably, in order to stably install the rotating shaft and facilitate reliable meshing connection between the rotating shaft and the corresponding driven shaft, there are two rotating shaft bearings, and an outwardly protruding convex ring is provided on the outer wall of the middle circumference of the rotating shaft between the two rotating shaft bearings, and the gear teeth of the rotating shaft are provided on the convex ring.

[0014] The beneficial effects of the present invention are:

[0015] The present invention drives two magnetic steel mounting parts and corresponding magnetic steels to rotate synchronously in the same direction through the same rotating shaft in a gear transmission manner, and the two magnetic steels and the corresponding hardware circuits are respectively located on the symmetrical sides of the rotating shaft. The shapes, sizes, magnetic field strengths, magnetizing directions, pole pairs and corresponding hardware circuit principles and installation methods of the two magnetic steels are exactly the same, so the consistency and synchronization of the two output signals are extremely high, meeting the application requirements of the dual-redundancy magnetic sensitive angular displacement sensor for highly synchronized two output signals; by adding anti-backlash retaining springs and anti-backlash gears, the gear transmission error between the rotating shaft and the corresponding driven shaft is extremely small, and the gap between the gears is reduced to near zero, thereby further improving the consistency and synchronization of the two output signals, and significantly improving the synchronization of the two output signals and the sensor detection accuracy as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a main sectional view of the efficient and synchronous dual-redundancy magnetic angular displacement sensor of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings:

[0018] like Figure 1 As shown, the efficient and synchronous dual-redundancy magnetic angular displacement sensor of the present invention comprises a housing 3, a cover plate 2, a rotating shaft 13, a first magnetic steel 8, a second magnetic steel 19, a first hardware circuit 10, a second hardware circuit 21, a first driven shaft 6, a second driven shaft 17, a first magnetic steel mounting member 5 and a second magnetic steel mounting member 20. The housing 3 and the cover plate 2 are interconnected to form an installation cavity (not marked in the figure). The rotating shaft 13 is installed in the installation cavity through a rotating shaft bearing 12 and passes through at least one side of the cavity wall. The first magnetic steel 8, the second magnetic steel 19, the first hardware circuit 10 and the second hardware circuit 21 are all installed in the installation cavity, and the first magnetic steel 8 corresponds to the first hardware circuit 10, and the second magnetic steel 19 corresponds to the second hardware circuit 21. The first driven shaft 6 is connected to the first driven shaft 6 through the first The driven bearing 4 is installed in the installation inner cavity, and the second driven shaft 17 is installed in the installation inner cavity through the second driven bearing 14. Gear teeth (not marked in the figure) are respectively provided on the circumferential outer wall of the first driven shaft 6 and the circumferential outer wall of the second driven shaft 17, and gear teeth (not marked in the figure) are provided on the circumferential outer wall of the middle section of the rotating shaft 13. The first driven shaft 6 and the rotating shaft 13, and the second driven shaft 17 and the rotating shaft 13 are respectively connected by gear tooth meshing. The first magnetic steel mounting member 5 is connected to the first driven shaft 6, and the second magnetic steel mounting member 20 is connected to the second driven shaft 17. The first magnetic steel mounting member 5 and the second magnetic steel mounting member 20 are respectively located on the symmetrical sides of the rotating shaft 13, and the first magnetic steel 8 is mounted on the first magnetic steel mounting member 5, and the second magnetic steel 19 is mounted on the second magnetic steel mounting member 20.

[0019] Figure 1Also shown are a first lead 1 led out from the first hardware circuit 10 and a second lead 22 led out from the second hardware circuit 21 , which are conventional adaptive structures.

[0020] like Figure 1 As shown, the basic working principle of the efficient and synchronous dual-redundancy magnetic angular displacement sensor of the present invention is as follows:

[0021] The rotation of the rotating shaft 13 drives the rotation of its own gear teeth, thereby driving the first driven shaft 6 and the second driven shaft 17 to rotate synchronously in the same direction through gear transmission; the first driven shaft 6 drives the first magnetic steel mounting part 5 and the first magnetic steel 8 to rotate synchronously in the same direction, and the first hardware circuit 10 synchronously analyzes the change in the magnetic field strength of the first magnetic steel 8 and outputs the corresponding angle signal through the first lead 1 to feed back to the host computer for use; the second driven shaft 17 drives the second magnetic steel mounting part 20 and the second magnetic steel 19 to rotate synchronously in the same direction, and the second hardware circuit 21 synchronously analyzes the change in the magnetic field strength of the second magnetic steel 19 and outputs the corresponding angle signal through the second lead 22 to feed back to the host computer for use. Since the rotation direction, speed, magnetic field strength, magnetization direction, number of magnetic pole pairs, and the shape and size of the first magnetic steel 8 and the second magnetic steel 19 are the same, the consistency and synchronization of the two output signals are very high, meeting the application requirements.

[0022] like Figure 1 As shown, a variety of specific optimized structures of the present invention are also disclosed below. According to actual needs, one or more of the structures can be rotated and combined with the above structure to form a more optimized technical solution.

[0023] Preferably, in order to minimize the occupied space while stabilizing the transmission, the efficient and synchronous dual-redundancy magnetic angular displacement sensor further includes a first transmission shaft 7 and a second transmission shaft 18, the first driven shaft 6 is provided with a central through hole and is sleeved outside the first transmission shaft 7 through the central through hole, the first magnetic steel mounting member 5 is connected to the first transmission shaft 7, the second driven shaft 17 is provided with a central through hole and is sleeved outside the second transmission shaft 18 through the central through hole, and the second magnetic steel mounting member 20 is connected to the second transmission shaft 18. The first transmission shaft 7 and the second transmission shaft 18 not only facilitate connection with the corresponding magnetic steel mounting members, but also provide a mounting basis for mounting the anti-backlash gear described below.

[0024] Preferably, in order to eliminate the clearance error between the rotating shaft 13 and the corresponding driven shaft during forward and reverse rotation, the efficient and synchronous dual-redundancy magnetic angular displacement sensor further includes a first backlash eliminating gear 11, a second backlash eliminating gear 15, a first backlash eliminating retaining spring 9 and a second backlash eliminating retaining spring 16. The first backlash eliminating gear 11 is sleeved on the first transmission shaft 7 through its own central through hole and is arranged in parallel with the first driven shaft 6. The end faces of the two are close to each other. The first backlash eliminating gear 11 is connected to the rotating shaft 13 through gear meshing. The two ends of the first backlash eliminating retaining spring 9 are respectively connected to the first backlash eliminating gear 11 and the first driven shaft 6 and meet the following conditions: The two sides of one gear tooth are in close contact with the corresponding gear teeth on the first driven shaft 6 and the corresponding gear teeth on the first anti-backlash gear 11 respectively; the second anti-backlash gear 15 is sleeved on the second transmission shaft 18 through its own center through hole and is arranged in parallel with the second driven shaft 17, and the end faces of the two are close to each other, the second anti-backlash gear 15 is connected to the rotating shaft 13 through gear tooth meshing, and the two ends of the second anti-backlash retaining spring 16 are respectively connected to the second anti-backlash gear 15 and the second driven shaft 17 and meet the following conditions: the two sides of one gear tooth on the rotating shaft 13 are in close contact with the corresponding gear teeth on the second driven shaft 17 and the corresponding gear teeth on the second anti-backlash gear 15 respectively. The clearance eliminating principle of the first clearance eliminating gear 11 and the first clearance eliminating retaining spring 9 is as follows: the installation of the first clearance eliminating retaining spring 9 makes the first clearance eliminating gear 11 and the first driven shaft 6 have rotational stresses in opposite directions, so that when the gear teeth on the rotating shaft 13 drive the gear teeth on the first driven shaft 6 to rotate, they are in close contact, and at this time, the gear teeth on the rotating shaft 13 are not in close contact with the gear teeth on the first clearance eliminating gear 11; conversely, when the rotation direction of the rotating shaft 13 is opposite, the gear teeth on the rotating shaft 13 drive the gear teeth on the first clearance eliminating gear 11 to rotate and are in close contact, and the gear teeth on the rotating shaft 13 are not in close contact with the gear teeth on the first driven shaft 6. Since the first clearance eliminating gear 11 and the first driven shaft 6 are both mounted on the first transmission shaft 7, they can both drive the first transmission shaft 7 to rotate synchronously, thereby achieving the purpose of clearance eliminating; the clearance eliminating principle of the second clearance eliminating gear 15 and the second clearance eliminating retaining spring 16 is similar and will not be repeated.

[0025] Preferably, in order to facilitate the installation of the backlash-eliminating retaining spring, the middle section of the first backlash-eliminating retaining spring 9 is placed in the corresponding groove provided on the first backlash-eliminating gear 11, and the two ends of the first backlash-eliminating retaining spring 9 are respectively placed in the connecting hole on the first backlash-eliminating gear 11 and the connecting hole of the first driven shaft 6; the middle section of the second backlash-eliminating retaining spring 16 is placed in the corresponding groove provided on the second backlash-eliminating gear 15, and the two ends of the second backlash-eliminating retaining spring 16 are respectively placed in the connecting hole on the second backlash-eliminating gear 15 and the connecting hole of the second driven shaft 17. This installation method allows the two backlash-eliminating retaining springs to be installed in the corresponding backlash-eliminating gear and the driven shaft, which neither occupies additional space nor affects the close contact between the corresponding backlash-eliminating gear and the driven shaft.

[0026] Preferably, in order to stably install the rotating shaft 13 and facilitate reliable meshing connection between the rotating shaft 13 and the corresponding driven shaft, there are two rotating shaft bearings 12, and an outwardly protruding convex ring is provided on the outer wall of the middle circumference of the rotating shaft 13 at a position between the two rotating shaft bearings 12, and the gear teeth of the rotating shaft 13 are provided on the convex ring. The width of the convex ring is equal to or slightly larger than the sum of the widths of the gear teeth on the first anti-backlash gear 11 and the first driven shaft 6, and the sum of the widths of the gear teeth on the second anti-backlash gear 15 and the second driven shaft 17, so that the first anti-backlash gear 11, the first driven shaft 6, the second anti-backlash gear 15 and the second driven shaft 17 can be driven to rotate synchronously and in the same direction at the same time through the rotating shaft 13.

[0027] The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. An efficient and synchronous dual-redundancy magnetic angular displacement sensor, comprising a housing, a cover plate, a rotating shaft, a first magnetic steel, a second magnetic steel, a first hardware circuit and a second hardware circuit, wherein the housing and the cover plate are connected to each other to form an installation cavity, the rotating shaft is installed in the installation cavity through a rotating shaft bearing, the first magnetic steel, the second magnetic steel, the first hardware circuit and the second hardware circuit are all installed in the installation cavity, and the first magnetic steel corresponds to the first hardware circuit, and the second magnetic steel corresponds to the second hardware circuit, wherein: The high-efficiency synchronous dual-redundancy magnetic sensitive angular displacement sensor also includes a first driven shaft, a second driven shaft, a first magnetic steel mounting part, and a second magnetic steel mounting part. The first driven shaft is mounted in the mounting inner cavity through a first driven bearing, and the second driven shaft is mounted in the mounting inner cavity through a second driven bearing. Gear teeth are respectively arranged on the circumferential outer wall of the first driven shaft and the circumferential outer wall of the second driven shaft, and gear teeth are arranged on the circumferential outer wall of the middle section of the rotating shaft. The first driven shaft and the rotating shaft, and the second driven shaft and the rotating shaft are respectively meshed and connected by gear teeth. The first magnetic steel mounting part The first magnetic steel mounting member is connected to the first driven shaft, the second magnetic steel mounting member is connected to the second driven shaft, the first magnetic steel mounting member and the second magnetic steel mounting member are respectively located on two symmetrical sides of the rotating shaft, the first magnetic steel is mounted on the first magnetic steel mounting member, and the second magnetic steel is mounted on the second magnetic steel mounting member; the efficient and synchronous dual-redundant magnetic angular displacement sensor also includes a first transmission shaft and a second transmission shaft, the first driven shaft is provided with a central through hole and is sleeved outside the first transmission shaft through the central through hole, the first magnetic steel mounting member is connected to the first transmission shaft, and the second driven shaft is provided with a The second magnetic steel mounting member is connected to the second transmission shaft through a central through hole and is sleeved on the outside of the second transmission shaft through the central through hole, and the second magnetic steel mounting member is connected to the second transmission shaft; the efficient and synchronous dual-redundancy magnetic sensitive angular displacement sensor also includes a first anti-backlash gear, a second anti-backlash gear, a first anti-backlash retaining spring and a second anti-backlash retaining spring, the first anti-backlash gear is sleeved on the first transmission shaft through its own central through hole and is arranged in parallel with the first driven shaft, the first anti-backlash gear is meshed with the rotating shaft through gear teeth, and the two ends of the first anti-backlash retaining spring are respectively connected to the first anti-backlash gear and the first driven shaft and meet the following conditions: The two sides of a gear tooth on the rotating shaft are respectively in close contact with the corresponding gear teeth on the first driven shaft and the corresponding gear teeth on the first anti-backlash gear; the second anti-backlash gear is sleeved on the second transmission shaft through its own center through hole and is arranged in parallel with the second driven shaft, the second anti-backlash gear is connected to the rotating shaft through gear tooth meshing, and the two ends of the second anti-backlash retaining spring are respectively connected to the second anti-backlash gear and the second driven shaft and meet the following conditions: the two sides of a gear tooth on the rotating shaft are respectively in close contact with the corresponding gear teeth on the second driven shaft and the corresponding gear teeth on the second anti-backlash gear.

2. The high-efficiency synchronous dual-redundancy magnetic angular displacement sensor according to claim 1 is characterized in that: The middle section of the first anti-backlash retaining spring is placed in the corresponding groove provided on the first anti-backlash gear, and the two ends of the first anti-backlash retaining spring are respectively placed in the connecting hole on the first anti-backlash gear and the connecting hole of the first driven shaft; the middle section of the second anti-backlash retaining spring is placed in the corresponding groove provided on the second anti-backlash gear, and the two ends of the second anti-backlash retaining spring are respectively placed in the connecting hole on the second anti-backlash gear and the connecting hole of the second driven shaft.

3. The high-efficiency synchronous dual-redundancy magnetic angular displacement sensor according to claim 1 or 2, characterized in that: There are two rotating shaft bearings, and an outwardly protruding convex ring is arranged on the outer wall of the middle circumference of the rotating shaft between the two rotating shaft bearings, and the gear teeth of the rotating shaft are arranged on the convex ring.

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