Component with an integrated sensor device for an optical, multi-axial measurement of a force application

Patent metadata

Field	Value
Publication number	US-12313485-B2
Application number	US-202118015337-A
Country	US
Kind code	B2
Filing date	Jul 29, 2021
Priority date	Jul 30, 2020
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A component has an integrated sensor device for an optical, multi-axis measurement of a force applied to the component. The component includes a cavity and a first support element having one or more first optical elements and a second support element having one or more second optical elements. The first support element and the second support element are formed in the cavity and partially inserted into the component. A transmission device generates at least two beams in independent directions when connected to a power source. The beams pass through the cavity between the first optical elements and the second optical elements. The first optical elements and the second optical elements are adapted to generate information about a relative positional change of the first support element with respect to the second support element based on the at least two beams. The transmission device provides the information for measuring the force application.

First claim

The invention claimed is:

1. A component with an integrated sensor device for an optical, multi-axial measurement of a force application on the component, the component comprising:
a cavity;
a first support element having one or more first optical elements and a second support element having one or more second optical elements, the first support element and the second support element being formed in the cavity and being partially inserted into the component; and
a transmission device, which is configured,
to be connected to a power source and
to transmit, when connected to the power source, at least two beams in independent directions, the beams passing through the cavity between the first optical elements and the second optical elements, respectively,

wherein the first optical elements and the second optical elements are adapted to generate information about a relative position change of the first support element with respect to the second support element based on the at least two beams,
wherein the second optical elements include a mirror arranged in a second beam of the at least two beams,
wherein the mirror deflects the second beam between a parallel part that extends parallel to a longitudinal axis of the component and an inclined part that is inclined relative to the longitudinal axis of the component, and
wherein the transmission device is adapted to provide the information for measuring the force application.

2. The component according to claim 1 ,
wherein the power source is a light source and the transmission device is configured for transmission of transmitting the information from the component through a light guide.

3. The component according to claim 1 , wherein the component is any one of the following:
a hollow shaft,
a hollow cylindrical component,
a pipe,
a robot element,
an element intended for a structure,
a crane arm,
a connecting element,
a column of a machine tool,
a tool,
a tool holder.

4. The component according to claim 1 , wherein the first optical elements or the second optical elements comprise an optical pattern and are configured to superimpose the at least two beams such that the information includes a change to a detected optical image of said pattern.

5. The component according to claim 1 , wherein the first optical elements and the second optical elements form a Michelson interferometer and the information is based on a Michelson interference pattern.

6. The component according to claim 1 , wherein at least one of the first optical elements and at least one of the second optical elements each comprise a partially reflective plate and are configured to form a Fabry-Pérot interferometer for at least one of the at least two beams.

7. The component according to claim 1 , wherein at least one further support element comprising one or more further optical elements is formed in the cavity and is partially inserted into the component.

8. The component according to claim 1 ,
wherein the power source is a current source and the transmission device is configured for transmitting the information from the component through an electrical line.

9. The component according to claim 1 ,
wherein the first optical elements include two beam expanding elements configured to expand light supplied by the power source via a light guide to generate the at least two beams.

10. The component according to claim 1 ,
wherein the second optical elements comprise a beam collecting element configured to the at least two beams and propagate the at least two beams as a light signal through a fiber optic cable.

11. The component according to claim 1 ,
wherein the first optical elements include light emitting diodes, and
wherein the second optical elements comprises a camera.

12. A method for manufacturing a component with an integrated sensor device for an optical, multi-axial measurement of a force application on the component, the component including a cavity, the method comprising:
providing an initial component having an initial cavity;
providing a first support element having one or more first optical elements and at least one further support element having one or more further optical elements;
providing a transmission device, which is configured,
to be connected to a power source and
to transmit, when connected to the power source, at least two beams in independent directions, the beams passing through the cavity between the first optical elements and the further optical elements, respectively:

positioning the first support element and the at least one further support element in the initial cavity;
cold solid recasting the initial component so as to form the component and the cavity; thereby
plastically joining the first support element and the at least one further support element so as to fix the first support element and the at least one further support element in the cavity,
wherein the further optical elements include a mirror arranged in a second beam of the at least two beams,
wherein the mirror deflects the second beam between a parallel part that extends parallel to a longitudinal axis of the component and an inclined part that is inclined relative to the longitudinal axis of the component.

13. The component according to claim 9 , further comprising an optical mask arranged at the two beam expanding elements.

Assignees

• Univ Darmstadt Tech

Inventors

• Groche Peter
• Al-Baradoni Nassr

Classifications

• G01L3/12

  involving photoelectric means · CPC title

• G01L3/1421

  using optical transducers · CPC title

• G01L5/24

  for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed · CPC title

• G01L5/166 Primary

  using photoelectric means · CPC title

• G01L1/241

  by photoelastic stress analysis · CPC title