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Photoelectric torque sensor for vehicle

A technology of torque sensor and photoelectric converter, which is applied in the field of non-contact photoelectric torque sensor and structural design of photoelectric torque sensor, can solve the problems of low precision and difficulty in improving the control level of electric power steering system, and achieve increased Inhomogeneity, ensuring size and shape accuracy, overcoming the effect of low measurement accuracy

Inactive Publication Date: 2004-07-07
TSINGHUA UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] Second, the accuracy of the sensor is about 10%, such a low accuracy is difficult to improve the control level of the Electric Power Steering (EPS) system

Method used

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  • Photoelectric torque sensor for vehicle
  • Photoelectric torque sensor for vehicle
  • Photoelectric torque sensor for vehicle

Examples

Experimental program
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Effect test

Embodiment

[0050] The present invention designs a photoelectric torque sensor for electric power steering (EPS) system of a car, and the specific structure is as follows: Figure 11 shown.

[0051] This embodiment adopts the a'a-type combination method: two photocells 1 and 1' are fixed side by side along the circumferential direction on the outer surface of the light-transmitting hole of the a-type light-transmitting arm 2; the light-emitting diode 4 is aligned with the a'-type The light guide hole of the light blocking arm 3 is fixed on the sleeve 8 . The light-transmitting arm 2 and the light-shielding arm 3 are installed on the inner end of the output shaft 17 and the sleeve 8 respectively, and the outer end of the sleeve 8 is pressed on the inner end of the input shaft 11, and the output shaft 17 is connected with pins 14 and 13 respectively. And the two ends of sleeve 8 and torsion bar 6 are fixed together. The lead of photocell 1 and 1 ' and light-emitting diode 4 is connected t...

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Abstract

A torque transducer in photoelectric type for vehicle belonging to special electronic equipment of transport vehicle is a photoelectric torque transducer in non-contacting type, which mainly composes of two photoelectric cells, a light-transparent arm with light-transparent hole and a light barrier arm with light-uiding hole, luminous diode, torsion bar and pencil of conducting line. The light transparent arm and light barrier arm are fixed at two ends of torsion bar separately, the photoelectric cell and luminous diode will be placed at outer side of light-transparent arm and light barrier arm separately and the conducting wires of photoelectric cell and luminous diode will be connected with outside through winding box. The invented transducer has simple structure, high accuracy measurement and no limitative of measuring range and it is especially good for measurement of steering torque in power-assisted steering system.

Description

technical field [0001] The invention belongs to the technical field of special electronic equipment for transport vehicles, in particular to the structural design of a photoelectric torque sensor in an electric power steering system, which is a non-contact photoelectric torque sensor. technical background [0002] The photoelectric torque sensor for electric power steering system (EPS) launched by the British Lucas company in 1992 has the characteristics of good electromagnetic compatibility and strong anti-interference ability. The structure of the sensor is shown in Figure 1, which is mainly composed of torsion bar 6, light source 4, code discs 2 and 3, photoelectric converters 1 and 1', etc. The code discs 2 and 3 are respectively fixed on the two ends of the torsion bar 6, the light source 4 and the photoelectric converters 1 and 1' are respectively arranged on the outer sides of the code discs 2 and 3, and are fixed on the housing, and each code disc is There are two r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L3/10
Inventor 季学武陈奎元
Owner TSINGHUA UNIV
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