Magnetic suspension electromagnetic propulsion-oriented vehicle-mounted rotor position and suspension gap detection system and method

Abstract

The invention discloses a vehicle-mounted rotor position and suspension gap detection system and method for magnetic suspension electromagnetic propulsion, and belongs to the technical field of magnetic suspension electromagnetic propulsion. The system comprises a triangular or trapezoidal grid hole shading plate, a laser detection device and a controller; the laser detection device comprises a plurality of laser generators and a plurality of laser detectors, and each laser generator and each laser detector pair are symmetrically arranged on the two sides of the triangular or trapezoidal grid hole shading plate with the triangular or trapezoidal grid hole shading plate as the center; in the process that the triangular or trapezoidal grid hole shading plate moves along with the vehicle-mounted rotor of the magnetic suspension electromagnetic propulsion system, the laser generator emits laser, the laser detector converts received laser pulse signals into electric signals, and the number and the duty ratio of the laser pulse signals are calculated and uploaded to the controller. According to the invention, high-reliability real-time position and suspension gap information of the vehicle-mounted rotor can be obtained, and stable electromagnetic thrust generated by the magnetic suspension electromagnetic propulsion system is ensured.

Description

Technical Field

[0001] This invention belongs to the field of magnetic levitation electromagnetic propulsion technology, specifically relating to a vehicle-mounted mover position and levitation gap detection system and method for magnetic levitation electromagnetic propulsion. Background Technology

[0002] In the field of high-speed magnetic levitation electromagnetic propulsion, the stator windings of a linear motor generate a traveling wave magnetic field, which interacts with the mover mounted on the vehicle to form a stable electromagnetic thrust, propelling the maglev train forward at high speed. This allows the mover to accelerate, maintain constant speed, and decelerate within a limited distance and time. During operation, the system requires real-time monitoring of the mover's position parameters for closed-loop control to ensure stable operation. Simultaneously, the system needs to monitor the mover's levitation clearance parameters. If a malfunction occurs in the maglev electromagnetic propulsion system, it must be shut down promptly to minimize damage caused by high-speed motion following system failure.

[0003] Existing solutions for detecting the position and levitation gap of the onboard mover in magnetic levitation electromagnetic propulsion vehicles either refer to the method of using encoders in traditional rotating motors and employ detector arrays to collect the pulses output by the mover as it passes the detectors, but cannot simultaneously detect the levitation gap of the onboard mover; or use grid-shaped planar capacitive sensors to detect the gap of magnetic levitation vehicles, but cannot simultaneously detect the position of the onboard mover.

[0004] Therefore, there is an urgent need to design a system and method for detecting the position and levitation gap of a vehicle-mounted mover in magnetic levitation electromagnetic propulsion, so as to realize the simultaneous detection of the position and levitation gap of the vehicle-mounted mover in magnetic levitation electromagnetic propulsion. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A vehicle-mounted mover position and levitation gap detection system for magnetic levitation electromagnetic propulsion includes: a triangular or trapezoidal grid hole light shield, a laser detection device, and a controller; the triangular or trapezoidal grid hole light shield is installed on the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion system, and the triangular or trapezoidal grid hole light shield is provided with equally spaced triangular grid holes or trapezoidal grid holes;

[0007] The laser detection device includes several laser generators and several laser detectors, with the same number of laser generators and laser detectors arranged along the track of the magnetic levitation electromagnetic propulsion system. Each pair of laser generators and laser detectors is symmetrically arranged on both sides of a triangular or trapezoidal grid aperture light-shielding plate, with the center of the plate. The laser generator in each pair of laser generators and laser detectors emits a laser beam, and the corresponding laser detector receives the laser signal.

[0008] During the movement of the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion system, the triangular or trapezoidal grid aperture light-shielding plate blocks the laser emitted by the laser generator. The laser detector receives the laser pulse signal transmitted through the triangular or trapezoidal grid aperture. The laser detector converts the received laser pulse signal into an electrical signal, calculates the number of detected laser pulse signals and the duty cycle of the laser pulse signals, and uploads the calculated number of laser pulse signals and duty cycle to the controller.

[0009] The present invention has the following beneficial effects:

[0010] This invention solves the problem of simultaneously measuring the position and suspension gap of the vehicle-mounted mover in magnetic levitation electromagnetic propulsion by designing triangular or trapezoidal grid holes on the light-shielding plate and using the number of pulse signals detected by a laser detection device to calculate the position of the vehicle-mounted mover. It also uses the duty cycle of the pulses detected by the laser detection device to calculate the suspension gap of the vehicle-mounted mover. This allows the motor control system to obtain highly reliable real-time position and suspension gap information of the vehicle-mounted mover, ensuring that the magnetic levitation electromagnetic propulsion system can generate stable electromagnetic thrust. At the same time, when the suspension system fails, it can quickly brake to ensure the safe operation of the vehicle. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the vehicle-mounted mover position and levitation gap detection system for magnetic levitation electromagnetic propulsion according to the present invention;

[0012] Figure 2 This is a topological diagram of the vehicle-mounted laser detection device for magnetic levitation electromagnetic propulsion according to the present invention. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0014] like Figure 1 As shown, Figure 1This is a block diagram of the vehicle-mounted mover position and levitation gap detection system for magnetic levitation electromagnetic propulsion according to the present invention. The system includes: a light-shielding plate with triangular or trapezoidal grid holes (transparent holes of a specific shape (triangular or trapezoidal) arranged at fixed intervals on a light-shielding plate), a laser detection device, and a controller. The triangular or trapezoidal grid hole light-shielding plate is mounted on the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion system, and the plate has equally spaced triangular or trapezoidal grid holes. The laser detection device includes several laser generators and several laser detectors, with the same number of laser generators and detectors arranged along the track of the magnetic levitation electromagnetic propulsion system. Each pair of laser generators and laser detectors is symmetrically arranged on both sides of the triangular or trapezoidal grid hole light-shielding plate, with the central point of the plate. Each laser generator and laser detector pair emits a laser beam, and the corresponding laser detector receives the laser signal. Starting from the first laser detector as the zero point, the absolute positions of each laser detector are set according to their installation spacing. As the triangular or trapezoidal grid aperture light-shielding plate moves along with the onboard mover of the magnetic levitation electromagnetic propulsion system, it blocks the laser emitted by the laser generator. The laser detectors receive the laser pulse signals transmitted through the triangular or trapezoidal grid apertures. The laser detectors convert the received laser pulse signals into electrical signals, calculate the number of detected laser pulse signals and their duty cycles, and upload these calculations to the controller. The controller calculates the position and levitation gap of the onboard mover based on the number of laser pulse signals and the duty cycle detected by the laser detectors.

[0015] like Figure 2 As shown, Figure 2This is a topological diagram of the laser detection device for the position of the vehicle-mounted moving part of the magnetic levitation electromagnetic propulsion system according to the present invention. The laser detection device of the present invention includes several laser generators and several laser detectors. The laser generators and laser detectors are arranged along the track of the magnetic levitation electromagnetic propulsion system. Each laser generator and its corresponding laser detector are arranged symmetrically around a triangular or trapezoidal grid aperture light-shielding plate, and are sequentially numbered as 1#, 2#...n# laser generators or laser detectors, where n is a positive integer. The triangular or trapezoidal grid aperture light-shielding plate is mounted on the vehicle-mounted moving part of the magnetic levitation electromagnetic propulsion system and moves with the moving part. The laser generator emits laser light and remains constantly lit. The laser detector receives the laser signal. During the movement of the triangular or trapezoidal grid aperture light-shielding plate along with the onboard mover of the magnetic levitation electromagnetic propulsion system, the triangular or trapezoidal grid aperture light-shielding plate blocks the laser light emitted by the laser generator. The laser detector receives the laser pulse signal transmitted through the triangular or trapezoidal grid aperture. The laser detector converts the received laser pulse signal into an electrical signal, calculates the number of detected laser pulse signals and the duty cycle of the laser pulse signal, and then uploads the calculated number of pulse signals and duty cycle to the controller.

[0016] The present invention provides a method for detecting the position and levitation gap of a vehicle-mounted mover in magnetic levitation electromagnetic propulsion, comprising:

[0017] S1, performs position calculations for the onboard mover of the magnetic levitation electromagnetic propulsion system, specifically including:

[0018] S11, the controller starts numbering each pair of laser generators and laser detectors from the initial laser generator and laser detector at the starting end of the magnetically levitated electromagnetically propelled vehicle. For example, laser generator #1 and laser detector #1, laser generator #2 and laser detector #2, laser generator #3 and laser detector #3, and so on, i# laser generator and i# laser detector, where i represents the i-th pair of laser generators and laser detectors;

[0019] S12, the controller sets the absolute position of each laser generator and laser detector pair with the installation position of laser generator #1 and laser detector #1 as the zero point. For example, the absolute position of laser generator #1 and laser detector #1 is X1, the absolute position of laser generator #2 and laser detector #2 is X2, the absolute position of laser generator #3 and laser detector #3 is X3, and so on, with the absolute position of laser generator #1 and laser detector #1 being X... i ;

[0020] S13, a triangular or trapezoidal grid hole light-shielding plate moves synchronously with the vehicle-mounted mover to block the laser emitted by the laser generator, thereby generating a light pulse signal; each laser generator is set to emit laser and remain in a constantly lit state, and each corresponding laser detector receives the light pulse signal;

[0021] S14, each laser detector converts the received optical pulse signal into an electrical pulse signal, records the number of electrical pulse signals, and transmits the number of electrical pulse signals to the controller;

[0022] S15, the controller receives the number of electrical pulse signals uploaded by each laser detector and numbers the number of electrical pulse signals uploaded by each laser detector according to the laser detector number. For example, the number of electrical pulse signals uploaded by laser detector i# is N. i .

[0023] The controller selects the number of electrical pulses transmitted by the laser detector being blocked by the triangular or trapezoidal grid aperture shield, based on the absolute position X of the laser generator and laser detector pair where the blocked laser detector pair (l#) is located. l The position Y1 of the vehicle-mounted mover is calculated by taking the grid width L of the triangular or trapezoidal grid hole of the light shield and the grid hole of the triangular or trapezoidal grid hole.

[0024] When a triangular or trapezoidal grid aperture shield is blocking laser detector #1, the controller determines the signal based on the number N of electrical pulse signals uploaded by laser detector #1. l The absolute position X of laser generator #1 and laser detector #1 l Calculate the position Y1 of the vehicle-mounted mover, where Y1 = X l +N l ×L.

[0025] S2, calculates the suspension clearance of the vehicle-mounted mover, specifically including:

[0026] S21, when the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion is moving at low speed, the duty cycle of the electrical pulse signal detected by the laser detector is the initial duty cycle d0.

[0027] S22, when the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion is moving at high speed and in a suspended state, the laser detector detects the duty cycle d of the electrical pulse signal, and calculates the suspension gap of the vehicle-mounted mover using the grid width L of the triangular or trapezoidal grid aperture and the dimensions of the triangular or trapezoidal grid aperture. When a triangular grid aperture is used, the grid aperture is a right triangle with a base length l1 and a height h1, and the suspension gap of the vehicle-mounted mover is calculated. The expression is When a trapezoidal grid aperture is used, the grid aperture is a right trapezoid with a base length of l2, a top length of l3, and a height of h2. Calculate the suspension gap of the vehicle-mounted mover. The expression is .

[0028] The above description is merely an embodiment of the present invention and does not limit the scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related system fields, are similarly included within the protection scope of the present invention.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A vehicle-mounted mover position and levitation gap detection system for magnetic levitation electromagnetic propulsion, characterized in that, include: Triangular or trapezoidal grid hole light shield, laser detection device and controller; the triangular or trapezoidal grid hole light shield is installed on the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion system, and the triangular or trapezoidal grid hole light shield is provided with equally spaced triangular grid holes or trapezoidal grid holes; The laser detection device includes several laser generators and several laser detectors, with the same number of laser generators and laser detectors arranged along the track of the magnetic levitation electromagnetic propulsion system. Each pair of laser generators and laser detectors is symmetrically arranged on both sides of a triangular or trapezoidal grid aperture light-shielding plate, with the center of the plate. The laser generator in each pair of laser generators and laser detectors emits a laser beam, and the corresponding laser detector receives the laser signal. During the movement of the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion system, the triangular or trapezoidal grid aperture light-shielding plate blocks the laser emitted by the laser generator. The laser detector receives the laser pulse signal transmitted through the triangular or trapezoidal grid aperture. The laser detector converts the received laser pulse signal into an electrical signal, calculates the number of detected laser pulse signals and the duty cycle of the laser pulse signals, and uploads the calculated number of laser pulse signals and duty cycle to the controller.

2. The vehicle-mounted mover position and levitation gap detection system for magnetic levitation electromagnetic propulsion according to claim 1, characterized in that, Starting from the first laser detector as the zero point, the absolute position of each laser detector is set according to the installation spacing of each laser detector.

3. The vehicle-mounted mover position and levitation gap detection system for magnetic levitation electromagnetic propulsion according to claim 1, characterized in that, The laser generator emits laser light and keeps it constantly lit. The laser detector receives the laser signal. During the movement of the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion system, the triangular or trapezoidal grid hole light-shielding plate blocks the laser light emitted by the laser generator. The laser detector receives the laser pulse signal transmitted through the triangular or trapezoidal grid hole.

4. The vehicle-mounted mover position and levitation gap detection system for magnetic levitation electromagnetic propulsion according to claim 1, characterized in that, The controller calculates the position and suspension gap of the vehicle-mounted mover based on the number of laser pulse signals detected by the laser detector and the duty cycle.

5. A method for detecting the position and levitation gap of a vehicle-mounted mover for magnetic levitation electromagnetic propulsion, used in the vehicle-mounted mover position and levitation gap detection system for magnetic levitation electromagnetic propulsion as described in any one of claims 1 to 4, characterized in that, include: S1, calculates the position of the onboard mover for magnetic levitation and electromagnetic propulsion; S2 calculates the levitation gap of the vehicle-mounted moving part for magnetic levitation and electromagnetic propulsion.

6. The method for detecting the position and levitation gap of a vehicle-mounted mover for magnetic levitation electromagnetic propulsion according to claim 5, characterized in that, S1 includes: S11, The controller starts from the laser generator and laser detector at the beginning of the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion and numbers each pair of laser generators and laser detectors as: i# laser generator and i# laser detector, where i represents the i-th pair of laser generators and laser detectors. S12, the controller sets the absolute position X of each laser generator and laser detector pair with the installation position of laser generator #1 and laser detector #1 as the zero point. i ; S13, a triangular or trapezoidal grid hole light-shielding plate moves synchronously with the vehicle-mounted mover to block the laser emitted by the laser generator, thereby generating a light pulse signal; each laser generator is set to emit laser and remain in a constantly lit state, and each corresponding laser detector receives the light pulse signal; S14, each laser detector converts the received optical pulse signal into an electrical pulse signal, records the number of electrical pulse signals, and transmits the number of electrical pulse signals to the controller; S15, the controller receives the number of electrical pulse signals uploaded by each laser detector and numbers the number of electrical pulse signals uploaded by each laser detector according to the laser detector number: i# laser detector uploads N electrical pulse signals. i ; When a triangular or trapezoidal grid aperture shield is blocking laser detector #1, the controller determines the signal based on the number N of electrical pulse signals uploaded by laser detector #1. l The absolute position X of laser generator #1 and laser detector #1 l The position Y1 of the vehicle-mounted mover is calculated based on the grid width L of the triangular or trapezoidal grid aperture light shield, where Y1 = X. l +N l ×L.

7. The method for detecting the position and levitation gap of a vehicle-mounted mover for magnetic levitation electromagnetic propulsion according to claim 6, characterized in that, In S15, the position Y1 of the vehicle-mounted mover is: Y1=X l +N l ×L.

8. The method for detecting the position and levitation gap of a vehicle-mounted mover for magnetic levitation electromagnetic propulsion according to claim 5, characterized in that, S2 include: S21, when the vehicle-mounted moving part of the magnetic levitation electromagnetic propulsion moves at low speed, the duty cycle of the electrical pulse signal detected by the laser detector is the initial duty cycle d0. S22, when the vehicle-mounted mover of the magnetic levitation electromagnetic propulsion is moving at high speed and in a suspended state, the laser detector detects the duty cycle d of the electrical pulse signal, and calculates the suspension gap of the vehicle-mounted mover using the grid width L of the triangular or trapezoidal grid hole and the size of the triangular or trapezoidal grid hole.

9. The method for detecting the position and levitation gap of a vehicle-mounted mover for magnetic levitation electromagnetic propulsion according to claim 8, characterized in that, In S22, when a triangular grid aperture is used, the grid aperture is a right triangle with a base length of l1 and a height of h1. Calculate the suspension gap of the vehicle-mounted mover. The expression is .

10. The method for detecting the position and levitation gap of a vehicle-mounted mover for magnetic levitation electromagnetic propulsion according to claim 8, characterized in that, In S22, when a trapezoidal grid hole is used, the grid hole is a right trapezoid with a base length of l2, a top length of l3, and a height of h2. Calculate the suspension gap of the vehicle-mounted mover. The expression is .

Images