Steering gear rack moving speed measuring structure and measuring method
By designing a reflection unit and a detection unit for the steering gear rack, the precise measurement of the moving speed of the steering gear rack is achieved, solving the problem of difficult measurement of the moving speed of the steering gear rack in intelligent driving, and improving the accuracy of line-controlled steering and the safety and comfort of intelligent driving of the automobile.
Patent Information
- Application Number
- CN202411751219.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-03-28
AI Technical Summary
In intelligent driving technology, the movement speed of traditional steering gear racks is difficult to measure in real time, resulting in the inability to accurately control the angle of the car wheels, affecting the accuracy of line-controlled steering.
A steering rack movement speed measurement structure is designed, including a reflection unit and a detection unit. The reflection unit is arranged on the steering rack, and the detection unit is arranged inside the steering rack. The moving distance, speed and acceleration of the steering rack are measured through a grating sensor and an ECU controller.
It realizes accurate measurement of the moving distance, speed and acceleration of the steering gear rack, and can establish a simulation model for the steering of automobiles and vehicles for line-controlled steering, provide accurate control basis, and optimizes the safety and comfort of line-controlled steering technology and intelligent driving of automobiles.
Smart Images
Figure CN119716132A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of automobile wire control, and in particular relates to a steering gear rack moving speed measurement structure and a measurement method. Background Art
[0002] The traditional automobile steering system consists of a steering wheel, a steering column system, an intermediate shaft system, and a steering gear with a tie rod system. The driver applies torque by operating the steering wheel, and the torque is transmitted to the steering gear with a tie rod system through the steering column system and the intermediate shaft system. The tie rod is connected to the steering knuckle of the wheel. When the steering wheel is turned, the steering gear rack is indirectly moved. The steering gear rack drives the steering gear tie rod, thereby driving the wheel to rotate and realize the vehicle steering movement.
[0003] At present, intelligent driving technology is developing rapidly. In intelligent driving technology, it relies on wire-controlled steering technology. The mechanical connection between the steering gear and the steering wheel is cancelled, and many wire-controlled steering actuators cancel the input shaft design. During the steering process of the whole vehicle, the driver needs to accurately grasp the steering wheel angle at any time. The wheel angle is driven by the power-assisted motor to move the steering gear rack, drive the car wheel, and realize the steering of the car. Therefore, there is no way to directly obtain the wheel angle and the real-time position of the car wheel, and it is impossible to provide a calculation basis for the precise control of the car wheel by wire-controlled steering.
[0004] Therefore, there is an urgent need to develop a device that can measure the moving distance, moving speed and acceleration of the steering rack, establish a simulation model of vehicle steering based on the measurement results, provide a calculation basis for the precise control of the vehicle wheels by wire-controlled steering, and optimize and improve the steering rack moving speed measurement structure and measurement method for intelligent driving of automobiles. Summary of the invention
[0005] The present invention is made to solve the above problems, and aims to provide a device capable of measuring the moving distance, moving speed and acceleration of a steering rack, establishing a simulation model of vehicle steering according to the measurement results, providing a calculation basis for the precise control of the vehicle wheels by wire steering, and optimizing and improving the steering rack moving speed measurement structure and measurement method for intelligent driving of automobiles. In order to achieve the above purposes, the technical solutions adopted by the present invention are as follows:
[0006] The invention provides a steering gear rack moving speed measuring structure, which has the following characteristics: the structure comprises a steering gear and a measuring component arranged on the steering gear.
[0007] The steering gear rack moving speed measuring structure provided by the present invention may also have such a feature that the steering gear includes a steering gear housing and a steering gear rack movably arranged in the steering gear housing.
[0008] The steering gear rack moving speed measuring structure provided by the present invention may also have such a feature that the measuring component includes a reflection unit and a detection unit, the reflection unit is arranged on the steering gear rack, and the detection unit is arranged on the inner side of the steering gear housing.
[0009] The steering gear rack moving speed measuring structure provided by the present invention may also have such a feature that the reflection unit includes a reflection mirror body and a reflection groove arranged on the reflection mirror body.
[0010] The steering gear rack moving speed measuring structure provided by the present invention may also have such a feature that the detection unit includes a grating sensor, and the grating sensor is arranged on the steering gear housing and located on one side of the reflector body.
[0011] The steering rack moving speed measuring structure provided by the present invention may also have such a feature that the detection unit further includes an ECU controller, and the ECU controller is connected to the grating sensor.
[0012] The steering rack moving speed measuring structure provided by the present invention may also have the following feature: the reflector body is made of glass material, and an aluminum film is provided on the glass material.
[0013] The steering gear rack moving speed measuring structure provided by the present invention may also have such a feature that the reflective grooves are evenly and densely arranged on the reflector body.
[0014] The steering rack moving speed measuring structure provided by the present invention may also have the following feature: 600 to 1800 reflective grooves are provided per millimeter.
[0015] The present invention also provides a measurement method based on the above-mentioned steering gear rack moving speed measurement structure, which has the following characteristics and includes the following steps: step S1, measuring the moving distance of the steering gear rack through the measuring component; step S2, measuring the moving time of the steering gear rack through the measuring component; step S3, repeating the above steps to obtain multiple test results; step S4, establishing a motion simulation model.
[0016] The technical effect of the present invention is as follows: the present invention provides a steering rack moving speed measurement structure including a steering gear and a measuring component arranged on the steering gear, the measuring component can measure the moving distance of the steering rack, can conveniently calculate the moving speed and acceleration of the steering rack, and establish a simulation model of automobile vehicle steering according to the measurement results and calculation results, thereby providing a calculation basis for the precise control of automobile wheels by wire steering, and can optimize and improve wire steering technology and automobile intelligent driving, and improve the safety and comfort of automobile intelligent driving. The present invention also provides a measurement method based on the steering rack moving speed measurement structure, which can establish a simulation model of automobile vehicle steering according to the measurement results, and can provide a calculation basis for the precise control of automobile wheels by wire steering.
[0017] Therefore, the steering rack moving speed measurement structure and measurement method provided by the present invention can measure the moving distance, moving speed and acceleration of the steering rack, can establish a simulation model of automobile steering based on the measurement results, can provide a calculation basis for the precise control of the automobile wheels by wire-controlled steering, and can optimize and improve the intelligent driving of the automobile. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] This specification includes the following drawings, which show the following contents:
[0019] Figure 1 Schematic diagram of the structure of the steering rack moving speed measuring structure in the embodiment of the present invention Figure 1 ;
[0020] Figure 2 Schematic diagram of the structure of the steering rack moving speed measuring structure in the embodiment of the present invention Figure 2 The components marked in the figure are: steering gear 10, steering gear housing 11, steering gear rack 12, measuring assembly 20, reflecting unit 21, reflector body 211, reflecting groove 212, detecting unit 22, grating sensor 221, and ECU controller 222. DETAILED DESCRIPTION
[0021] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.
[0022] Figure 1 Schematic diagram of the structure of the steering rack moving speed measuring structure in the embodiment of the present invention Figure 1 ; Figure 2 Schematic diagram of the structure of the steering rack moving speed measuring structure in the embodiment of the present invention Figure 2 .
[0023] like Figure 1 and Figure 2 As shown, in the intelligent driving technology, the wire control steering technology is relied on, the mechanical connection between the steering gear and the steering wheel is cancelled, and many wire control steering actuators cancel the input shaft design. During the steering process of the whole vehicle, the driver needs to accurately grasp the steering wheel angle at any time. The steering angle of the wheel is driven by the steering gear rack driven by the power assist motor to drive the vehicle wheel to realize the steering of the vehicle. Therefore, there is no way to directly obtain the wheel angle and the real-time position of the vehicle wheel, and it is impossible to provide a calculation basis for the precise control of the vehicle wheel by wire control steering. Therefore, the present invention provides a steering gear rack moving speed measurement method. The measurement structure includes a steering gear 10 and a measuring component 20 arranged on the steering gear 10. The steering gear 10 includes a steering gear housing 11 and a steering gear rack 12 movably arranged in the steering gear housing 11. The measuring component 20 can measure the moving distance of the steering gear rack 12, and can conveniently calculate the moving speed and acceleration of the steering gear rack 12. According to the measurement results and the calculation results, a simulation model of automobile steering is established, thereby providing a calculation basis for the precise control of the automobile wheels by wire control steering, and can optimize and improve the wire control steering technology and automobile intelligent driving, and improve the safety and comfort of automobile intelligent driving.
[0024] The measuring component 20 includes a reflecting unit 21 and a detecting unit 22. The reflecting unit 21 is arranged on the steering gear rack 12, and the detecting unit 22 is arranged on the inner side of the steering gear housing 11. The reflecting unit 21 can move with the steering gear rack 12. The detecting unit 22 can measure the moving distance of the steering gear rack 12 through the reflecting unit 21, so as to conveniently calculate the moving speed and acceleration of the steering gear rack 12. A simulation model of vehicle steering is established according to the measurement results and the calculation results, so as to provide a calculation basis for the precise control of the vehicle wheels by wire control steering, optimize and improve the wire control steering technology and vehicle intelligent driving, and improve the safety and comfort of vehicle intelligent driving.
[0025] The reflection unit 21 includes a reflector body 211 and reflective grooves 212 arranged on the reflector body 211. The reflective grooves 212 are evenly arranged on the reflector body 211 to form a reflective grating. The reflector body 211 is made of glass, and an aluminum film is provided on the glass material. Dense parallel grooves are engraved by diamond to form the reflective grooves 212, so that the reflective grooves 212 are evenly and densely arranged on the reflector body 211. The reflective grooves 212 are provided with 600 to 1800 grooves per millimeter. In this embodiment, the reflective grooves 212 are provided with 12 grooves per millimeter. The specification of 00 bars is set on the reflector body 21, which is beneficial to improve the accuracy of the reflection unit 21 and the detection unit 22, improve the accuracy of the measurement results of the moving distance of the steering gear rack 12, and improve the accuracy of the calculated moving speed and acceleration of the steering gear rack 12. A simulation model of vehicle steering is established based on the measurement results and calculation results, thereby providing a more accurate calculation basis for the precise control of the vehicle wheels by wire steering, which can further optimize and improve the wire steering technology and automobile intelligent driving, and further improve the safety and comfort of automobile intelligent driving.
[0026] The detection unit 22 includes a grating sensor 221, which is arranged on the steering gear housing 11 and located on one side of the reflector body 211. The grating sensor 221 can use grating technology to measure and detect, and is usually used to accurately measure position, speed, angle and other physical quantities. The working principle of the grating sensor 221 is based on the diffraction and interference phenomenon of light, and can convert the change of physical quantity into a measurable light signal. The grating sensor 221 emits light, which is reflected by the reflection unit 21. The grating sensor 221 receives the light reflected by the reflection unit 21, and can obtain the moving distance of the steering gear rack 12. The grating sensor 221 It can provide very high measurement accuracy and is suitable for applications that require precise control and measurement. It can be used in the research fields of wire-controlled steering technology and intelligent automobile driving. It can ensure the accuracy of the measurement results of the moving distance of the steering gear rack 12. The grating sensor 221 adopts non-contact measurement, which can avoid the interference of the grating sensor 221 with the steering gear rack 12 and other structures during the measurement process, and can avoid mechanical wear and interference, further improving the accuracy of the measurement results of the moving distance of the steering gear rack 12. The grating sensor 211 can quickly respond to changes in physical quantities, is suitable for dynamic measurement, and is suitable for measuring the moving distance of the steering gear rack 12.
[0027] The detection unit 22 also includes an ECU controller 222, which is connected to the grating sensor 221. The ECU controller 222 is an electronic control system used in automobiles and other mechanical equipment, and is responsible for monitoring and managing various functions to ensure the performance, safety and efficiency of the vehicle. When the grating sensor 221 receives the light reflected by the reflection unit 21, it calculates the moving distance of the reflection unit 21, that is, the moving distance of the steering gear rack 12, based on the light reflected by the reflection unit 21. After the grating sensor 221 calculates the moving distance of the steering gear rack 12 based on the reflection pipeline situation, it sends the moving distance of the steering gear rack 12 to the ECU controller 222 in real time in the form of a CAN signal.
[0028] The ECU controller 222 is integrated with the power-assisting motor controller of the steering gear 10 to save the layout space of the signal receiving and transmitting and computing chips, so that the real-time timing of the internal timer of the power-assisting motor of the steering gear 10 is realized, and the internal timer of the power-assisting motor transmits the real-time timing of the wire-controlled steering to the ECU controller 222. The moving distance and time of the steering gear rack 12 can be used to measure the moving speed of the steering gear rack 12. The acceleration of the steering gear rack 12 can be obtained by taking the derivative of the moving speed of the steering gear rack 12. After many tests, the rotation torque and rotation time of the power-assisting motor are controlled, and the moving distances, moving speeds and accelerations of multiple groups of steering gear racks 12 are measured. According to the measurement results and calculation results, a simulation model of vehicle steering is established, thereby providing a more accurate calculation basis for the precise control of the vehicle wheels by wire-controlled steering, which can further optimize and improve the wire-controlled steering technology and intelligent driving of vehicles, and further improve the safety and comfort of intelligent driving of vehicles.
[0029] The present invention also provides a measurement method based on the steering rack moving speed measurement structure, which can establish a simulation model of vehicle steering according to the measurement results and provide a calculation basis for the precise control of the vehicle wheels by wire control steering, comprising the following steps:
[0030] Step S1, measuring the moving distance of the steering gear rack by the measuring component 20, the grating sensor 221 emits light, which is reflected by the reflecting unit 21, and the grating sensor 221 receives the light reflected by the reflecting unit 21, so as to measure the moving distance of the steering gear rack 12;
[0031] Step S2, measuring the movement time of the steering gear rack and the real-time timing of the internal timer of the power-assisting motor of the steering gear 10 by the measuring component 20, and the internal timer of the power-assisting motor transmits the real-time timing of the wire control steering to the ECU controller 222;
[0032] Step S3, controlling the rotation torque and rotation time of the power-assisting motor, and measuring the moving distance, moving speed and acceleration of the plurality of steering gear racks 12;
[0033] Step S4, establishing a simulation model of vehicle steering according to the measurement results and the calculation results, further calculating the real-time angular position of the vehicle wheels according to the simulation model, providing a calculation basis for precise control of the vehicle wheels by wire-controlled steering according to the simulation model, optimizing and improving the precise control of the steering gear power motor, and realizing precise control of the movement of the steering gear rack 12, thereby providing accurate data support for the wire-controlled vehicle controller to control the vehicle wheel angle in real time.
[0034] Therefore, the steering rack moving speed measurement structure provided by the present invention can measure the moving distance of the steering rack 12, can conveniently calculate the moving speed and acceleration of the steering rack 12, and establish a simulation model of automobile vehicle steering according to the measurement results and the calculation results, thereby providing a calculation basis for the precise control of the automobile wheels by wire steering, and can optimize and improve the wire steering technology and automobile intelligent driving, and improve the safety and comfort of automobile intelligent driving. The measurement method according to the steering rack moving speed measurement structure provided by the present invention can establish a simulation model of automobile vehicle steering according to the measurement results, can provide a calculation basis for the precise control of the automobile wheels by wire steering, can optimize and improve the wire steering technology and automobile intelligent driving, and improve the safety and comfort of automobile intelligent driving.
[0035] Functions and Effects of the Embodiments
[0036] The present invention provides a steering gear rack moving speed measurement structure, including a steering gear 10 and a measuring component 20 arranged on the steering gear 10, wherein the steering gear 10 includes a steering gear housing 11 and a steering gear rack 12 movably arranged in the steering gear housing 11, and the measuring component 20 can measure the moving distance of the steering gear rack 12, and can conveniently calculate the moving speed and acceleration of the steering gear rack 12, and establish a simulation model of vehicle steering according to the measurement results and the calculation results, thereby providing a calculation basis for the precise control of the vehicle wheels by wire control steering, and can optimize and improve the wire control steering technology and vehicle intelligent driving, and improve the safety and comfort of vehicle intelligent driving. The measurement method based on the steering rack moving speed measurement structure provided by the present invention can establish a simulation model of automobile steering according to the measurement results, can provide a calculation basis for the precise control of the automobile wheels by wire steering, can optimize and improve the wire steering technology and automobile intelligent driving, and improve the safety and comfort of automobile intelligent driving. The steering rack moving speed measurement structure and measurement method provided by the present invention can measure the moving distance, moving speed and acceleration of the steering rack, can establish a simulation model of automobile steering according to the measurement results, can provide a calculation basis for the precise control of the automobile wheels by wire steering, and can optimize and improve the automobile intelligent driving.
[0037] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.
Claims
1. A steering gear rack moving speed measurement structure, characterized in that: The invention comprises a diverter (10) and a measuring component (20) arranged on the diverter (10).
2. The steering rack moving speed measuring structure according to claim 1, characterized in that: The steering gear (10) comprises a steering gear housing (11) and a steering gear rack (12) movably arranged in the steering gear housing (11).
3. The steering rack moving speed measuring structure according to claim 2, characterized in that: The measuring assembly (20) comprises a reflection unit (21) and a detection unit (22); the reflection unit (21) is arranged on the steering gear rack (12); and the detection unit (22) is arranged on the inner side of the steering gear housing (11).
4. The steering rack moving speed measuring structure according to claim 3, characterized in that: The reflection unit (21) comprises a reflection mirror body (211) and a reflection groove (212) arranged on the reflection mirror body (211).
5. The steering rack moving speed measuring structure according to claim 4, characterized in that: The detection unit (22) comprises a grating sensor (221), and the grating sensor (221) is arranged on the steering gear housing (11) and is located on one side of the reflector body (211).
6. The steering rack moving speed measuring structure according to claim 5, characterized in that: The detection unit (22) further comprises an ECU controller (222), and the ECU controller (222) is connected to the grating sensor (221).
7. The steering rack moving speed measuring structure according to claim 6, characterized in that: The reflector body (211) is made of glass material, and an aluminum film is provided on the glass material.
8. The steering rack moving speed measuring structure according to claim 7, characterized in that: The reflective grooves (212) are evenly and densely arranged on the reflector body ().
9. The steering rack moving speed measuring structure according to claim 8, characterized in that: The number of reflective grooves (212) is 600 to 1800 per millimeter.
10. A method for measuring the steering rack moving speed measuring structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1, measuring the moving distance of the steering gear rack by measuring the component; Step S2, measuring the moving time of the steering gear rack by measuring the component; Step S3, repeating the above steps to obtain multiple test results; Step S4, establishing a motion simulation model.