Bicycle component provided with a temperature-compensated stress/strain sensor

Patent metadata

Field	Value
Publication number	US-11214331-B2
Application number	US-201916407639-A
Country	US
Kind code	B2
Filing date	May 9, 2019
Priority date	May 11, 2018
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A bicycle component comprising a stress/strain sensor aligned according to a stress/strain to be detected, and a temperature sensor associated with said stress/strain sensor, wherein said stress/strain sensor and said temperature sensor lie in planes that do not coincide with one another and are not parallel to each another.

First claim

What is claimed is:

1. A bicycle component comprising a stress/strain sensor aligned according to a direction of stress/strain to be detected, and a temperature sensor associated with said stress/strain sensor, wherein said stress/strain sensor and said temperature sensor are on the same bicycle component and lie in planes that do not coincide with one another and are not parallel to each another, and
said bicycle component further comprising a cavity and a shell of composite material comprising structural fiber incorporated in a polymeric matrix extending around said cavity,
wherein the stress/strain sensor is arranged on a first region of an inner surface of the shell, the temperature sensor is arranged on a second region of the inner surface of the shell, said first region and said second region are substantially orthogonal to each other, and,
wherein the shell has an inner projection and at least one of the first region or the second region is on said inner projection.

2. The bicycle component according to claim 1 , wherein said planes are substantially orthogonal to each other.

3. The bicycle component according to claim 2 , wherein said stress/strain sensor has a detection direction aligned according to the direction of said stress/strain to be detected, and the plane in which said temperature sensor lies is not orthogonal to said detection direction of said stress/strain sensor.

4. The bicycle component according to claim 1 , wherein said temperature sensor is thermally matched to said stress/strain sensor.

5. The bicycle component according to claim 1 , wherein said stress/strain sensor and said temperature sensor are positioned in a substantially isothermal region of the bicycle component.

6. The bicycle component according to claim 1 , wherein at least said first region extends along a direction of stress/strain to be detected.

7. The bicycle component according to claim 6 , wherein the component is oblong and the first region substantially extends along a length direction (L) and along a thickness (S) of the component, and wherein the second region substantially extends along the length direction (L) and along a width (G) of the component.

8. The bicycle component according to claim 1 , further comprising a second stress/strain sensor and a second temperature sensor, lying in planes not coinciding with one another and not parallel to each other.

9. A bicycle component comprising a first stress/strain sensor aligned according to a direction of stress/strain to be detected, and a first temperature sensor associated with said first stress/strain sensor, wherein said first stress/strain sensor and said first temperature sensor are on the same bicycle component and lie in planes that do not coincide with one another and are not parallel to each another, and
a second stress/strain sensor and a second temperature sensor, lying in planes not coinciding with one another and not parallel to each other,
wherein the first stress/strain sensor and the first temperature sensor are applied on first and second regions of an inner surface of a shell of composite material comprising structural fiber incorporated in a polymeric matrix and having an inner projection, and
the second stress/strain sensor is arranged on a third region of an inner surface of the shell, the second temperature sensor is arranged on a fourth region of the inner surface of the shell, said third region and said fourth region being substantially orthogonal to each other, wherein the first region and the second region are made at a first inner edge of the shell and the third region and the fourth region are made at a second inner edge of the shell adjacent to the first edge, wherein the shell has a second inner projection, along the second inner edge of the shell, and at least one of the third region or the fourth region is made on said second projection.

10. The bicycle component according to claim 9 , wherein the first and the second stress/strain sensors lie in planes substantially parallel to one another, and wherein the first and the second temperature sensors lie substantially in a same plane.

11. A bicycle component comprising a stress/strain sensor aligned according to a direction of a stress/strain to be detected, and a temperature sensor associated with said stress/strain sensor, wherein said stress/strain sensor and said temperature sensor lie in planes that do not coincide with one another and are not parallel to each another, wherein
said stress/strain sensor and said temperature sensor are applied on first and second regions of an inner surface of a shell that is formed of composite material comprising structural fiber incorporated in a polymeric matrix, said shell having an inner projection, and
said first region and said second region of the inner surface of the shell are substantially orthogonal to each other and at least one of said first region or said second region is defined on said inner projection.

12. The bicycle component according to claim 11 , wherein at least said first region extends along a direction of stress/strain to be detected.

13. The bicycle component according to claim 11 , wherein the component is oblong and the first region substantially extends along a length direction (L) and along a thickness (S) of the component, and wherein the second region substantially extends along the length direction (L) and along a width (G) of the component.

14. A bicycle component comprising a stress/strain sensor aligned according to a direction of a stress/strain to be detected, and a temperature sensor associated with said stress/strain sensor, wherein said stress/strain sensor and said temperature sensor lie in planes that do not coincide with one another and are not parallel to each another,
wherein said stress/strain sensor and said temperature sensor are applied on first and second regions of an inner surface of a shell that is formed of composite material comprising structural fiber incorporated in a polymeric matrix, and
said first region and said second region of the inner surface of the shell are substantially orthogonal to each other.

15. The bicycle component according to claim 14 , further comprising a core, and a shell of composite material comprising structural fiber incorporated in a polymeric matrix extending around said core, at least one of the stress/strain sensor or the temperature sensor being arranged between the core and the shell.

16. The bicycle component according to claim 15 , wherein said core comprises at least one recess, and at least one of the stress/strain sensor or the temperature sensor is arranged in said at least one recess.

17. The bicycle component according to claim 14 , wherein the bicycle component is a crankarm comprising a main body extending along a length direction (L) between a rotation axis (X) and a pedal axis (Y 1 , Y 2 ), said main body carrying said stress/strain sensor and said temperature sensor.

18. The bicycle component according to claim 14 , wherein said planes are substantially orthogonal to each other.

19. The bicycle component according to claim 14 , wherein said temperature sensor is thermally matched to said stress/strain sensor.

20. The bicycle component according to claim 14 , wherein said stress/strain sensor and said temperature sensor are positioned in a substantially isothermal region of the bicycle component.

Assignees

• Campagnolo Srl

Inventors

• Wakeham Keith Joseph

Classifications

• B62M3/00 Primary

  Construction of cranks operated by hand or foot · CPC title

• B62M1/36

  with rotary cranks, e.g. with pedal cranks (B62M1/34 takes precedence; combined with reciprocating levers B62M1/26; cranks which can be immobilised as foot rests B62M5/00) · CPC title

• B62J45/411

  Torque sensors · CPC title

• G01L5/1627

  of strain gauges (using piezoresistors G01L5/162) · CPC title

• G01B7/18

  using change in resistance · CPC title