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Cylindrical optical fiber torque sensing device for power-assisted steering system of motor vehicle

A technology of power steering and torque sensing, which is applied to automatic steering control components, force/torque/power measuring instruments, steering mechanisms, etc., and can solve the problems of being easily affected by temperature changes, electromagnetic interference waterproof function, and being susceptible to electromagnetic interference, etc. , to achieve the effect of flexible use, good use prospects and simple structure

Inactive Publication Date: 2012-05-30
XIAN JINHE OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contact type is mainly a potentiometer-type torque sensing device. Its advantages are low cost, easy installation and use, and its disadvantages are that it is easily affected by temperature changes, easy to wear, and has a short service life. The monitoring function is lost due to the entry of water in the device, such as a car being submerged in stagnant water; non-contact torque sensing devices mainly include electromagnetic induction, photoelectric and ultrasonic torque sensing devices, which have the advantages of non-contact, no wear, and high precision. High, long life, the disadvantage is high installation accuracy, high cost, vulnerable to electromagnetic interference and poor waterproof function

Method used

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  • Cylindrical optical fiber torque sensing device for power-assisted steering system of motor vehicle
  • Cylindrical optical fiber torque sensing device for power-assisted steering system of motor vehicle
  • Cylindrical optical fiber torque sensing device for power-assisted steering system of motor vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 , figure 2 and image 3 A cylindrical optical fiber torque sensing device used in a power steering system of a motor vehicle shown includes a housing 10, an input shaft 11, an output shaft 13 and a torsion bar 12, and the input shaft 11, the output shaft 13 and the torsion bar The rod 12 is arranged inside the casing 10, and the casing 10 is movably connected with the input shaft 11 and the output shaft 13. The lower end of the input shaft 11 is installed on the upper end of the torsion bar 12, and the upper end of the output shaft 13 is installed on the torsion bar. The lower end of the rod 12, the casing 10 is also provided with a steering device capable of rotating the input shaft 11, the output shaft 13 and the torsion bar 12, and a curved shape is arranged on the outer side wall or the inner side wall of the torsion bar 12. There are multiple sets of A-side deformed teeth 4-1 and multiple sets of B-side deformed teeth 4-2 on the opposite sides o...

Embodiment 2

[0037] Such as Figure 4 As shown, in this embodiment, the difference from Embodiment 1 is: a light reflection device 20 is installed at one end of the signal fiber 33 in the curved slot 4, and the light reflection device 20 is fixed on the surface of the input shaft 11, and the signal fiber 33 The other end of the transmission fiber-1 is connected to the transmission fiber-1, and the transmission fiber-1 is connected to the fiber interface of the fixed body part on the fiber optic slip ring 25 fixed on the end face of the output shaft 13 through the middle hole of the output shaft 13, and the fiber optic slip ring 25 rotating body part The optical fiber interface is connected to the second transmission fiber 38, and the second transmission fiber 38 is connected to the test unit 5 through the third fixed point 23 and the 1X2 optical splitter 23. The steering device includes a steering column three 35 and a steering column four 36, the steering column three 35 is installed on t...

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PUM

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Abstract

The invention discloses a cylindrical optical fiber torque sensing device for a power-assisted steering system of a motor vehicle. The cylindrical optical fiber torque sensing device comprises a shell, an input shaft, an output shaft and a torsion bar, wherein the shell is movably connected with an input shaft and an output shaft; the lower end of the input shaft is arranged at the upper end of the torsion bar; the upper end of the output shaft is arranged at the lower end of the torsion bar; a steering device is arranged in the shell; the torsion bar is provided with a curved aperture; multiple groups of side A deformed teeth and multiple groups of side B deformed teeth are arranged on two opposite sides inside the curved aperture; the multiple groups of side A deformed teeth and the multiple groups of side B deformed teeth are arranged in a staggered way; a curved channel for a signal optical fiber to pass is formed between head parts of the multiple groups of side A deformed teeth and the multiple groups of side B deformed teeth; side A deformed teeth and side B deformed teeth are correspondingly arranged on both sides of the signal optical fiber; the signal optical fiber is connected to a testing unit through a transmission optical fiber I of which one end is fixed on an input shaft or an output shaft; and an ECU (Electronic Control Unit) is connected behind the testing unit. The cylindrical optical fiber torque sensing device can resist electromagnetic interference, has high water-proof and dust-proof performance, and meet the practical use requirements of a motor vehicle.

Description

technical field [0001] The invention relates to a torque sensing device, in particular to a cylindrical optical fiber torque sensing device used in a motor vehicle power steering system. Background technique [0002] In order to improve the comfort and safety of motor vehicle driving, most of the existing motor vehicles are equipped with power steering devices on the steering column connected with the steering wheel. Common power steering devices are: hydraulic power steering device, electro-hydraulic power steering device, electric power steering device (referred to as EPS). Electric power steering devices have been widely used in current motor vehicles due to their advantages of energy saving, environmental protection, simple structure, convenient maintenance and easy control. [0003] EPS is a momentum steering device that provides auxiliary torque directly from the electric motor. There are many types of EPS, but the basic principle is the same: the torque sensing devi...

Claims

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Application Information

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IPC IPC(8): B62D6/10G01L5/22
CPCG01L5/221G01L3/12B62D6/10
Inventor 杜兵
Owner XIAN JINHE OPTICAL TECH