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Sensor head for force or torque sensor

A technology of torque sensor and sensing head, which is applied in the field of sensing head, can solve the problems of no application, etc., and achieve the effect of cost saving and compact structure

Inactive Publication Date: 2019-04-19
TRAFAG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this measuring principle has been known for decades, it is hardly used in practice

Method used

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  • Sensor head for force or torque sensor
  • Sensor head for force or torque sensor
  • Sensor head for force or torque sensor

Examples

Experimental program
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Embodiment Construction

[0080] The drawings show various embodiments of a sensor head 10 for a magneto-elastic force or torque sensor, the sensor head 10 being used to measure force or torque in a ferromagnetic body 9.

[0081] The sensor head 10 is formed of a sensor package 12 constructed by a plurality of packaging methods. Manufacturing can be further achieved using micromechanical manufacturing methods (MEMS), additive manufacturing or printed circuit board technology. Multiple combinations are also possible.

[0082] The sensor head 10 includes a magnetic field generating unit 14 for generating a magnetic field in the ferromagnetic body 9 and a magnetic field measuring unit 16 for measuring the magnetic field change in the ferromagnetic body 9.

[0083] The magnetic field generating unit 14 has an excitation coil 18 and a flux amplifying element. in Figure 1 to Figure 4 In a number of configurations, the excitation coil 18 is arranged around a soft magnetic excitation core 20. At least one ferrit...

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Abstract

The aim of the invention is to allow a practical suitability of a force or torque sensor and the applicability thereof for different uses with a low-cost production process at the same time. Accordingto the invention, this is achieved by a sensor head (10) for a magnetoelastic force or torque sensor for measuring a force or a torque in a ferromagnetic body (9), comprising the following: a magnetic field-generating unit (14) for generating a magnetic field in the ferromagnetic body (9) and a magnetic field-measuring unit (16) for measuring a change in the magnetic field in the ferromagnetic body (9), wherein the magnetic field-generating unit (14) has an excitation coil (18) and a soft-magnetic excitation flux amplification element (20), and the magnetic field-measuring unit (16) has multiple measurement coils (22) with a soft-magnetic measurement flux amplification element (24). At least the excitation coils (18) and the measurement coils (22, 22a-22d) are integrated into a common integrated component, such as a printed circuit board element (26) and / or MEMS component (28) in particular.

Description

Technical field [0001] The present invention relates to a sensor head for a magneto-elastic force or torque sensor. The sensor head is used to measure the force or torque in a ferromagnetic body. Background technique [0002] Magnetoelastic force sensors or torque sensors are known, for example, in US 2 912 642, DE 30 31 997 A1 or US 4503 714 or EP 0 136 086 A2. More magnetoelastic force or torque sensors are described in EP 2 397 829 B1 or EP 2 615 422 B1. [0003] In this type of sensor, force measurement or torque measurement is performed by means of the magnetoelastic effect. Several magnetic materials exhibit close interaction between their magnetic and mechanical properties. In this regard, several magnetic field lines of a magnetic field induced in a ferromagnetic body are changed by several loads of the magnet. [0004] Therefore, a plurality of magnetoelastic sensors usually have a magnetic field generating unit for generating a magnetic field in the ferromagnetic body an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/12G01L3/10H01L41/12H10N35/00
CPCG01L1/125G01L3/102H10N35/101B29C45/14819B29L2031/3425G01L1/127G01L3/105
Inventor 克里斯托夫·尚茨迪特尔·蔡塞尔
Owner TRAFAG