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Torque sensor

A technology of torque sensor and induction port, which is applied in the direction of torque measurement, instruments, measuring devices, etc., can solve the problem of low measurement accuracy of torque sensor, and achieve the effects of high reliability, improved measurement accuracy and strong stability

Inactive Publication Date: 2012-02-15
王成
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to disclose a kind of torque sensor, to solve the defect that the measurement accuracy of the existing torque sensor is not high

Method used

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Embodiment Construction

[0017] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] Such as Figure 1-Figure 4 As shown, a torque sensor is disclosed, including a housing 1, two sets of induction coils and a magnetic isolation sleeve 2, the housing 1 is in the shape of a hollow cylinder, and the two sets of induction coils include a first induction coil 3 and a second induction coil 11 , the first induction coil 3 and the second induction coil 11 are wrapped in the shell 1 parallel to each other, and the coils inside the first induction coil 3 and the second induction coil 11 have current access, so a certain inductance can be generated. The first induction coil 3 and the second induction coil 11 are insulated from each other. The innermost layer of the shell 1 is equipped with a magnetic isolation sleeve 2. The magnetic isolation sleeve 2 is generally made of aluminum. 6. The positions corresponding to...

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Abstract

The invention discloses a torque sensor, so that a defect of low measuring precision of a torque sensor in the prior art can be overcome. The torque sensor is characterized in that: a shell is in a cylinder shape and is hollow inside; two sets of induction coils are parallel mutually and are sleevedly installed in the shell separately; magnetic shields are sleevedly installed at an innermost layer of the shell; two sets of induction ports are respectively arranged at positions where the magnetic shields are corresponded to the two sets of the induction coils; the two sets of the induction ports are formed by a plurality of induction openings that are mutually independent and are paved and arranged with a certain interval along induction surfaces of the induction coils; and the induction openings in the two sets of the induction ports are in staggered arrangements along a longitudinal axial direction of each the magnetic shield. Twisting movements of a twist spindle enable inductances in the corresponded induction coils to be changed through the two sets of the induction ports; and terminals on the shell transmit a differential value of inductances in the two sets of the induction coil to an external controller. According to the invention, the employed shell is manufactured by an iron-based powder metallurgy functional material and thus, the shell is not sensitive to a temperature and an external interference; and the torque sensor has advantages of high reliability as well as a sturdy and durable performance. Meanwhile, a measuring precision is improved and the stability is strengthened.

Description

technical field [0001] The invention relates to a torque sensor, in particular to a sensor for sensing the torque generated by the torsion force during the steering process of an automobile. Background technique [0002] The torque sensor is an integral part of the EPS (Electronic Power Steering) system. Although the structural components of the EPS system of different cars are different, the components are generally the same. The EPS system mainly uses the power generated by the electric motor to assist the driver. Power steering, therefore, the torque sensor is one of the essential components. [0003] The torque sensor used in the EPS system can be divided into contact type and non-contact type. It mainly uses the torsion shaft to convert the torque into torsional stress or torsion angle, and then converts it into an electrical signal that has a certain relationship with the torque, and transmits it through the sensor. The form of torsion shaft has solid shaft, hollow sh...

Claims

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Application Information

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IPC IPC(8): G01L3/00
Inventor 王成
Owner 王成
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