A high-precision anti-interference position and speed integrated sensor device

Abstract

The application relates to the technical field of position and speed integrated sensors, and discloses a high-precision anti-interference position and speed integrated sensor device. The inside of an anti-interference mounting box is sequentially provided with a first PCB (printed circuit board), and the side surface of the anti-interference mounting box is integrated with a rotor position sensor and an integrated coil; the inside of the anti-interference mounting box is provided with an electromagnetic interference suppression assembly, which comprises a composite filter layer composed of an electromagnetic coil and a sponge wrapped with conductive cloth; the sponge fills the right side space of the electromagnetic coil; the porous structure can absorb part of low-frequency electromagnetic interference; the electromagnetic coil forms complementary filtering; the conductive cloth wrapped with the sponge extends to the inner wall of the cover plate, and forms a Faraday cage, so that the internal PCB and the sensor are completely isolated from external radiation noise; the through holes of the first PCB and the second PCB maintain stable electrical connection in the shielding environment; the electromagnetic coil can suppress the cross interference of the magnetic field leakage of the integrated coil on the sensor, and ensure the signal purity.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of position and speed integrated sensors, in particular to a high-precision anti-interference position and speed integrated sensor device. BACKGROUND

[0002] The position and speed integrated sensor is an integrated sensing device integrating position detection and speed measurement functions, and is mainly applied to the fields of industrial automation, mechanical control and specific environment monitoring. The core feature is that two sensing technologies are integrated in a single structure to realize synchronous data acquisition and transmission.

[0003] At present, the position and speed integrated sensor device is usually exposed for use, so that the position and speed integrated sensor device is easily affected by external electromagnetic waves during use, thereby affecting the normal use of the position and speed integrated sensor device and reducing the position and speed detection effect of the device. Meanwhile, the position and speed integrated sensor device adopts a joint clamping mode to integrally connect the position sensor and the speed sensor for use, so that the joint is easily loosened due to vibration and external factors. SUMMARY

[0004] (I) Technical problems solved

[0005] To address the shortcomings of existing technologies, this invention provides a high-precision, anti-interference integrated position and velocity sensor device. An electromagnetic coil serves as the first layer of active filtering, suppressing high-frequency noise from entering the signal circuit through inductive coupling. Sponge fills the space to the right of the electromagnetic coil to prevent component loosening; its porous structure absorbs some low-frequency electromagnetic interference, forming a complementary filter with the electromagnetic coil. Conductive cloth wraps around the sponge and extends to the inner wall of the cover plate, forming a Faraday cage that completely isolates the internal PCB and sensor from external radiated noise. Through tight contact with the metal anti-interference mounting box and cover plate, interference current is directed to the grounding path. Weak signals from the rotor position sensor and rotor speed sensor are transmitted under multi-layered filtering protection, avoiding bit errors or signal distortion. The first PCB and the second PCB... The through-holes of the board maintain stable electrical connections in a shielded environment. The electromagnetic coil suppresses cross-interference of the integrated coil's magnetic field leakage to the sensor, ensuring a pure feedback signal. When motor or external vibrations are transmitted to the anti-interference mounting box, the counterweight moving block slides up and down along the sliding seat under inertia, forming a reverse inertial force to counteract the vibration energy. The counterweight moving block is located on both sides of the connector to ensure torque balance in vibration cancellation, preventing signal deviation caused by unilateral force on the sensor. The wiring passes through the grooves of the clamping plates on both sides. By manually rotating the fastening threaded rod, the fastening plate is driven to slide inward along the groove, pressing the anti-slip block against the wiring surface to form a flexible fixation. The bearing connection between the fastening threaded rod and the fastening plate allows for unidirectional tightening. When rotating in the opposite direction, friction self-locks to prevent loosening caused by vibration. The silicone material of the anti-slip block increases friction to prevent cable slippage and avoids damage to the cable insulation layer by metal clamps. The counterweight moving block reduces the direct impact of mechanical vibration on the rotor position sensor. The clamping plates prevent wiring from falling off or making poor contact due to vibration, ensuring continuous and reliable signal transmission.

[0006] (II) Technical Solution

[0007] To solve the above technical problems, the present invention provides the following technical solution: including an anti-interference mounting box, characterized in that: a first PCB board is sequentially arranged inside the anti-interference mounting box, and a rotor position sensor and an integrated coil are integrated on its side surface;

[0008] The anti-interference mounting box is equipped with an electromagnetic interference suppression component, which includes a composite filter layer consisting of an electromagnetic coil and a sponge wrapped with conductive cloth.

[0009] The side surface of the anti-interference mounting box is provided with a removable cover plate, and its inner wall and conductive cloth form a fully enclosed shielding structure.

[0010] The rotor position sensor is connected to a wiring via a connector, and the wiring extends to the outside of the anti-interference mounting box and connects to the rotor speed sensor.

[0011] The upper surface of the rotor position sensor is provided with a clamping mechanism, the shrinkage clamping mechanism comprises a counterweight moving block driven clamping plate, the clamping plate is controlled by a fastening threaded rod to form self-locking fixation to the butt joint of the wire, the rotor position sensor and the rotor speed sensor are dynamically coupled through a slidable connection wire assembly, the wire assembly comprises a linear guide mechanism composed of a sliding seat and a sliding block, the counterweight moving block is symmetrically arranged to balance the vibration effect, the clamping mechanism further comprises an anti-skid block made of silica gel and arranged on the contact surface of the fastening plate, and the fastening threaded rod can rotatably drive the fastening plate to linearly move.

[0012] Preferably, the anti-interference installation box is further provided with an installation groove, and a rubber seat is embedded in the installation groove to reduce vibration.

[0013] Preferably, the electromagnetic interference suppression assembly is provided with an electromagnetic coil arranged on the radial outer side of the first PCB, and a sponge-wrapped conductive cloth extends to the inner wall of the cover plate to form a continuous conductive path.

[0014] Preferably, the first PCB and the second PCB are electromagnetically coupled through an integrated coil, and the three are provided with through holes to form axially aligned heat dissipation channels.

[0015] Preferably, the cover plate is detachably connected to the anti-interference installation box through a first bolt, and the inner surface of the cover plate is in pressure contact with the conductive cloth.

[0016] Preferably, the rotor speed sensor is adjustably installed through a second bolt, and the signal line and the wire form an integrated shielding structure.

[0017] Compared with the prior art, the present application provides a high-precision anti-interference position and speed integrated sensor device, which has the following advantages:

[0018] 1、The electromagnetic coil as the first layer active filtering element suppresses high-frequency noise from entering the signal circuit through inductive coupling, the sponge fills the space on the right side of the electromagnetic coil to avoid loosening of the assembly, the porous structure can absorb part of the low-frequency electromagnetic interference, and the electromagnetic coil and the sponge form complementary filtering, the conductive cloth wrapped around the sponge extends to the inner wall of the cover plate to form a Faraday cage, which completely isolates the internal PCB and the sensor from external radiation noise, the interference current is introduced into the grounding path through close fitting with the metal anti-interference installation box and the cover plate, the weak signals of the rotor position sensor and the rotor speed sensor are transmitted under the protection of multi-layer filtering, error codes or signal distortion are avoided, the through holes of the first PCB and the second PCB maintain stable electrical connection in the shielding environment, the electromagnetic coil can suppress the cross interference of the magnetic field leakage of the integrated coil on the sensor, and ensures the purity of the feedback signal.

[0019] 2、The present application when the motor or external vibration is transmitted to the anti-interference mounting box, the counterweight moving block slides up and down along the sliding block on the sliding seat under the action of inertia, forms a reverse inertia force, offsets the vibration energy, the counterweight moving block is located on both sides of the joint, ensures the torque balance of vibration offset, avoids the signal deviation caused by unilateral stress of the sensor, the wiring passes through the groove of the clamping plate on both sides, the fastening plate is driven to slide inward along the groove by manually rotating the fastening screw rod, the anti-skid block is pressed to fit the wiring surface, forms flexible fixing, the bearing connection of the fastening screw rod and the fastening plate allows one-way tightening, when reversely rotating, is self-locked due to friction, prevents loosening caused by vibration, the silica gel material of the anti-skid block not only increases the friction force to prevent cable slipping, but also avoids damaging the cable insulation layer by metal clamping, the counterweight moving block reduces the direct influence of mechanical vibration on the rotor position sensor, the clamping plate prevents the wiring from falling off or poor contact due to vibration, ensures continuous and reliable signal transmission. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic diagram of the present application;

[0021] Figure 2 It is the structure schematic diagram of the left side of the first PCB plate of the present application;

[0022] Figure 3 It is the structure schematic diagram of A in Figure 2;

[0023] Figure 4 It is the internal structure schematic diagram of the anti-interference mounting box of the present application;

[0024] Figure 5 It is the structure schematic diagram of the conductive cloth of the present application.

[0025] 1, anti-interference mounting box;2, wiring;3, rotor speed sensor;4, second bolt;5, first bolt;6, cover plate;7, first PCB plate;8, through hole;9, second PCB plate;10, integrated coil;11, rotor position sensor;12, clamping plate;13, counterweight moving block;14, sliding seat;15, sliding block;16, joint;17, fastening screw rod;18, fastening plate;19, anti-skid block;20, rubber seat;21, mounting groove;22, conductive cloth;23, electromagnetic coil;24, sponge. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Referring to FIGS. 1-5, a high-precision anti-interference position and speed integrated sensor device includes an anti-interference mounting box 1, the inside of the anti-interference mounting box 1 is sequentially provided with a first PCB board 7, the first PCB board 7 is integrated with a SIN / COS decoding circuit, which processes the original analog signal of the position sensor, the side surface of the first PCB board 7 is integrated with a rotor position sensor 11 and an integrated coil 10, the rotor position sensor 11 adopts a SIN / COS encoder or an IPM / SPM motor encoder, outputs a high-precision U / V / W phase signal, and supports DC / AC motor commutation control, the side surface of the anti-interference mounting box 1 is provided with a detachable cover plate 6, the inner wall of the cover plate 6 and a conductive cloth 22 form a fully enclosed shielding structure, the rotor position sensor 11 is connected to a connecting wire 2 through a joint 16, the connecting wire 2 extends to the outside of the anti-interference mounting box 1 and is connected to a rotor speed sensor 3, the rotor speed sensor 3 is compatible with an optical or magneto SPM motor encoder, calculates the speed and direction through the pulse frequency or phase difference, the first PCB board 7 and a second PCB board 9 form electromagnetic coupling through the integrated coil 10, and the inside of the three is provided with a through hole 8 to form an axially aligned heat dissipation channel, the cover plate 6 is detachably connected to the anti-interference mounting box 1 through a first bolt 5, and the inner surface of the cover plate 6 is in pressure contact with the conductive cloth 22, the rotor speed sensor 3 is adjustably installed through a second bolt 4, and the signal line of the rotor speed sensor 3 and the connecting wire 2 form an integrated shielding structure.

[0028] The rotor position sensor 11 outputs a phase signal by detecting the rotor magnetic pole position, providing the basis for the commutation timing of the motor controller, and the rotor speed sensor 3 is an optical encoder or a magnetic encoder, which feeds the rotor speed pulse signal to the controller through the wire 2, calculates the real-time speed and direction, and the integrated coil 10 is used as the excitation coil of the motor stator winding or encoder, which generates an electromagnetic field after being energized and interacts with the rotor. The first PCB board 7 processes the position sensor signal, which may integrate the signal conditioning circuit, and the second PCB board 9 may be responsible for speed signal decoding or power driving. The second PCB board 9 is responsible for the digital signal decoding and power driving logic generation of the DC / AC motor speed sensor. The through hole 8 is used for electrical connection or mechanical fixation, ensuring signal or power transmission across the board, and the anti-interference mounting box 1 and the cover plate 6 protect the internal sensors and circuits. The rotor position sensor 11 monitors the motor rotor magnetic pole position in real time and outputs U / V / W three-phase signals to the controller to determine the motor commutation logic. The rotor speed sensor 3 generates pulse signals through the grating or magnetic grating effect and transmits them to the controller through the wire 2. The speed and direction are calculated by pulse frequency or phase difference, forming a closed-loop control. The first PCB board 7 processes the original position signal, and the second PCB board 9 may amplify the driving signal or decode the encoder data. Finally, the integrated coil 10 is controlled by the timing of energization, driving the motor to rotate, and the position and speed sensors are integrated to form a double feedback. The controller dynamically adjusts the winding current to achieve precise speed regulation and position tracking.

[0029] The anti-interference mounting box 1 is internally provided with an electromagnetic interference suppression component, including an electromagnetic coil 23 and a composite filter layer composed of a sponge 24 wrapped with a conductive cloth 22. The electromagnetic coil 23 and the conductive cloth 22 form a double-layer filter to suppress the interference of the magnetic field leakage of the integrated coil 10 on the SIN / COS encoder signal. The anti-interference mounting box 1 is also provided with a mounting groove 21, and the rubber seat 20 embedded in the mounting groove 21 is used for shock absorption. The rubber seat 20 cooperates with the counterweight moving block 13 to reduce the influence of vibration on the sampling accuracy of the IPM motor encoder. The electromagnetic coil 23 in the electromagnetic interference suppression component is arranged radially outside the first PCB board 7, and the conductive cloth 22 wrapped with the sponge 24 extends to the inner wall of the cover plate 6 to form a continuous conductive path.

[0030] The rubber seat 20 is embedded in the installation groove 21 to absorb mechanical vibration transmitted by the motor or externally, prevent the rotor position sensor 11 and the rotor speed sensor 3 from signal drift or damage caused by vibration, and provide accurate positioning for the installation groove 21 to ensure stable cooperation of the rubber seat 20 with the PCB board, the electromagnetic coil 23 and other components. The electromagnetic coil 23 serves as the first layer of active filtering element to suppress high-frequency noise from entering the signal circuit through inductive coupling. The sponge 24 fills the space on the right side of the electromagnetic coil 23 to avoid component loosening, and its porous structure can absorb part of the low-frequency electromagnetic interference and form complementary filtering with the electromagnetic coil 23. The conductive cloth 22 extends to the inner wall of the cover plate 6 after wrapping the sponge 24, forming a Faraday cage to completely isolate the internal PCB and sensors from external radiation noise. By closely fitting with the metal anti-interference mounting box 1 and the cover plate 6, the interference current is guided into the grounding path. The weak signals of the rotor position sensor 11 and the rotor speed sensor 3 are transmitted under the protection of multi-layer filtering to avoid error code or signal distortion. The through hole 8 of the first PCB board 7 and the second PCB board 9 maintains stable electrical connection in a shielded environment. The electromagnetic coil 23 can suppress the cross interference of the magnetic field leakage of the integrated coil 10 on the sensor to ensure the purity of the feedback signal.

[0031] The upper surface of the rotor position sensor 11 is provided with a clamping mechanism, and the shrinkage clamping mechanism includes a clamping plate 12 driven by a counterweight moving block 13. The clamping plate 12 is controlled by a fastening screw rod 17 to form a self-locking fixation with a fastening plate 18 to the wire 2. The rotor position sensor 11 and the rotor speed sensor 3 are dynamically coupled through a slidable connection wire assembly. The wire assembly includes a linear guide mechanism composed of a sliding seat 14 and a sliding block 15. The counterweight moving block 13 is symmetrically arranged to balance the vibration influence. The clamping mechanism also includes an anti-slip block 19 made of silica gel and arranged on the contact surface of the fastening plate 18. The fastening screw rod 17 can rotate to drive the fastening plate 18 to move linearly.

[0032] When the motor or external vibration is transmitted to the anti-interference mounting box 1, the counterweight moving block 13 slides up and down on the sliding seat 14 through the sliding block 15 under the action of inertia, forming a reverse inertia force to offset the vibration energy. The counterweight moving block 13 is located on both sides of the joint 16, ensuring the moment balance of the vibration offset, avoiding the signal deviation of the rotor position sensor 11 caused by unilateral force. The wire 2 passes through the groove of the clamping plate 12 on both sides, and by manually rotating the fastening screw rod 17, the fastening plate 18 is driven to slide inward along the groove, pressing the anti-slip block 19 to fit the surface of the wire 2, forming a flexible fixation. The bearing connection between the fastening screw rod 17 and the fastening plate 18 allows one-way tightening, and when rotated in the opposite direction, it is self-locked due to friction, preventing loosening caused by vibration. The silicone material of the anti-slip block 19 not only increases the friction to prevent the cable from slipping off, but also avoids damage to the cable insulation layer caused by metal clamping. The counterweight moving block 13 reduces the direct impact of mechanical vibration on the rotor position sensor 11, and the clamping plate 12 prevents the wire 2 from falling off or poor contact due to vibration, ensuring continuous and reliable signal transmission.

[0033] In use, the anti-interference mounting box 1 is fixed on the motor housing, ensuring that the rotor position sensor 11 and the rotor speed sensor 3 are accurately aligned with the motor rotor, the first bolt 5 is used to fasten the cover plate 6 to the side surface of the anti-interference mounting box 1, ensuring that the cover plate 6 is tightly attached to the conductive cloth 22, forming a fully enclosed electromagnetic shield. When tightening the first bolt 5, uniform force should be applied to avoid deformation of the cover plate. Check whether the rubber seat 20 in the mounting groove 21 is intact. The rubber seat 20 is used to absorb motor vibration. If the rubber seat 20 is aged or damaged, it needs to be replaced to ensure the damping effect. Connect the connector 16 of the rotor position sensor 11 to the signal input port of the motor controller. Connect the wire 2 of the rotor speed sensor 3 to the speed feedback port of the controller. Insert the wire 2 into the groove of the clamping plate 12. Rotate the fastening screw rod 17 manually to drive the fastening plate 18 to slide inward. The anti-slip block 19 of the fastening plate 18 will press the surface of the wire 2, forming a flexible fixation. Tighten the fastening screw rod 17 until it is self-locking. Ensure that the wire 2 is not bent or stretched to avoid signal loss. Provide power for the integrated coil 10, which acts as a motor stator winding or encoder excitation coil, generating an electromagnetic field after being energized. Connect the power supply and ground wire of all PCB boards to ensure that the first PCB board 7 and the second PCB board 9 are normally powered. Ensure that the conductive cloth 22 completely wraps the sponge 24 and extends to the inner wall of the cover plate 6, forming a Faraday cage shield. After installation, use a multimeter to check whether the shielding layer is continuously grounded to eliminate external electromagnetic interference. The composite filter layer composed of the electromagnetic coil 23 and the sponge 24 will automatically work, but you need to check whether the electromagnetic coil 23 is tightly embedded on the left side of the sponge 24 before energizing to avoid loosening. The integrated coil 10 is energized to generate an electromagnetic field that interacts with the rotor. The rotor position sensor 11 detects the rotor magnetic pole position in real time and outputs U / V / W three-phase signals to the controller, providing the basis for commutation timing. The rotor speed sensor 3 detects the rotor motion and generates a pulse signal, which is fed back to the controller through the wire 2. The controller calculates the real-time speed and direction according to the pulse frequency or phase difference. The controller integrates the position and speed signals to dynamically adjust the current timing of the integrated coil 10 through the first PCB board 7 and the second PCB board 9, achieving precise motor speed regulation and position tracking. When the load changes, the controller corrects the winding current based on the speed signal feedback to maintain stable operation. When the motor vibrates, the counterweight moving block 13 slides on the sliding seat 4 through the sliding block 15, generating a reverse inertial force to cancel out the vibration energy and protect the sensor signal stability. No user intervention is required, but the counterweight moving block 13 should be checked regularly for smooth movement. During operation, use an oscilloscope or controller software to monitor the signal waveforms of the rotor position sensor 11 and the rotor speed sensor 3 to ensure that there is no distortion or noise, allowing the device to function normally.

[0034] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and variations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A high-precision, anti-interference integrated position and velocity sensor device, comprising an anti-interference mounting box. (1), characterized in that: The anti-interference mounting box (1) has a first PCB board (7) arranged inside, and a rotor position sensor (11) and an integrated coil (10) are integrated on its side surface. The anti-interference mounting box (1) is equipped with an electromagnetic interference suppression component, including an electromagnetic coil (23). A composite filter layer consisting of a sponge (24) wrapped with conductive cloth (22); The side surface of the anti-interference mounting box (1) is provided with a removable cover plate (6), the inner wall of which is connected to the guide. The electrical cloth (22) forms a fully enclosed shielding structure; The rotor position sensor (11) is connected to the wiring (2) via a connector (16), the wiring (2) Extend to the outside of the anti-interference mounting box (1) and connect to the rotor speed sensor (3); The upper surface of the rotor position sensor (11) is provided with a clamping mechanism. The clamping mechanism includes a clamping plate (12) driven by a counterweight moving block (13). The clamping plate (12) controls the fastening plate (18) to form a self-locking fixation with the wiring (2) through a fastening threaded rod (17). The rotor position sensor (11) and the rotor speed sensor (3) are dynamically coupled through a slidably connected wiring assembly. The wiring assembly includes a linear guide mechanism composed of a sliding seat (14) and a slider (15). The counterweight moving block (13) has a symmetrical arrangement structure to balance the vibration effect. The clamping mechanism also includes an anti-sliding slider (19), which is made of silicone and is set on the contact surface of the fastening plate (18). The fastening threaded rod (17) can rotate to drive the fastening plate (18) to move linearly.

2. The high-precision, anti-interference integrated position and velocity sensor assembly according to claim 1 The device is characterized by: The anti-interference mounting box (1) is also provided with a mounting groove (21), and a rubber seat (20) is embedded in the mounting groove (21) for shock absorption.

3. The high-precision anti-interference integrated position and velocity sensor device according to claim 1, characterized in that: In the electromagnetic interference suppression component, the electromagnetic coil (23) is located on the radial outer side of the first PCB board (7), and the conductive cloth (22) wrapped by the sponge (24) extends to the inner wall of the cover plate (6) to form a continuous conductive path.

4. The high-precision anti-interference integrated position and velocity sensor device according to claim 1, characterized in that: The first PCB board (7) and the second PCB board (9) are electromagnetically coupled through an integrated coil (10), and the three boards are provided with through holes (8) to form an axially aligned heat dissipation channel.

5. The high-precision anti-interference integrated position and velocity sensor device according to claim 1, characterized in that: The cover plate (6) is detachably connected to the anti-interference mounting box (1) by the first bolt (5), and the inner surface of the cover plate (6) is in pressure contact with the conductive cloth (22).

6. The high-precision anti-interference integrated position and velocity sensor device according to claim 1, characterized in that: The rotor speed sensor (3) is adjustable by means of the second bolt (4), and its signal line and wiring (2) form an integrated shielding structure.

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