US 2026/0219074 A1Published application

Method for measuring the angular position of a rotary shaft of a motor vehicle

AssigneeContinental Automotive Technologies GmbH

InventorsDariga TOULON, Thierry CHAUCHARD

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Abstract

A method for measuring the angular position of a rotary shaft of a motor vehicle by a target fixed at a free end of the shaft and a position sensor mounted facing the target. The method includes the steps of generating a first sine signal and a first cosine signal characterizing the angular variations of the target relative to the sensor when the shaft is rotating, generating a second sine signal and a second cosine signal characterizing the angular variations of the target relative to the sensor when the shaft is rotating, generating a first angle value signal and a second angle value signal, and calculating the mean angular position of the shaft at a given time on the basis of the first angle value signal, the second angle value signal, and the predetermined phase shift value.

Claims7

Dependent claims

A method for measuring the angular position of a rotary shaft of a motor vehicle by means of a target fixed to a free end of said shaft and comprising a magnetic element, and a magnetoresistive position sensor mounted facing said target, said method comprising:

generating a first sine signal and a first cosine signal characterizing the angular variations of the target relative to the sensor when the shaft is rotating,
generating a second sine signal and a second cosine signal characterizing the angular variations of the target relative to the sensor when the shaft is rotating, the first sine signal and the second sine signal being phase-shifted by a predetermined phase shift value,
generating a first angle value signal representing a first angular position of the shaft on the basis of the first sine signal and the first cosine signal,
the sensor comprising at least a first generation module, the step of generating the first sine signal and the first cosine signal is performed by said first generation module on the basis of the variations in electromagnetic field direction generated by the rotation of the target and the step of generating the second sine signal and the second cosine signal is performed by said first generation module or by an electronic control unit on the basis of the first sine signal and the first cosine signal,
generating a second angle value signal representing a second angular position of the shaft on the basis of the second sine signal and the second cosine signal,
calculating the mean angular position of the shaft at a given time (t) on the basis of the first angle value signal, the second angle value signal, and the predetermined phase shift value, according to the following formula:
if
(
SA
⁢
1
⁢
(
t
)
+
SA
⁢
2
⁢
(
t
)
+
D
⁢
P
⁢
H
)
<
360
,
[
Math
⁢
81
]
then
:
PAM
⁡
(
t
)
=
(
SA
⁢
1
⁢
(
t
)
+
SA
⁢
2
⁢
(
t
)
+
D
⁢
P
⁢
H
)
2
[
Math
⁢
82
]
else
⁢
if
(
SA
⁢
1
⁢
(
t
)
+
SA
⁢
2
⁢
(
t
)
+
D
⁢
P
⁢
H
)
>
360
,
[
Math
⁢
83
]
then
:
PAM
⁡
(
t
)
=
(
SA
⁢
1
⁢
(
t
)
+
SA
⁢
2
⁢
(
t
)
+
D
⁢
P
⁢
H
)
-
3
⁢
6
⁢
0
2
[
Math
⁢
84
]
where SA1(t) is the value of the first angle value signal at time t, SA2(t) is the value of the second angle value signal at time t, and DPH is the predetermined phase shift value.

150 more elements

A motor vehicle comprising:

an electronic control unit,
at least one rotary shaft comprising a target fixed at one of its ends,
a position sensor mounted facing said target and connected by at least one communication link to the electronic control unit, the sensor being configured to generate a first sine signal and a first cosine signal characterizing the angular variations of the target when the shaft is rotating, and to send the first sine signal and the first cosine signal to the electronic control unit,
the electronic control unit being configured to:
receive the first sine signal and the first cosine signal,
simulate a second sine signal and a second cosine signal characterizing the angular variations of the target when the shaft is rotating on the basis of the first sine signal and the first cosine signal, the first sine signal and the second sine signal being phase-shifted by a predetermined phase shift value, the first cosine signal and the second cosine signal being phase-shifted by a predetermined phase shift value,
generate a first angle value signal representing a first angular position of the shaft on the basis of the first sine signal received and the first cosine signal received,
generate a second angle value signal representing a second angular position of the shaft on the basis of the second sine signal simulated and the second cosine signal simulated,
calculate the mean angular position of the shaft at a given time on the basis of the value of the first angle value signal, the value of the second angle value signal, and the predetermined phase shift value, according to the following formula:
if
(
SA
⁢
1
⁢
(
t
)
+
SA
⁢
2
⁢
(
t
)
+
D
⁢
P
⁢
H
)
<
360
,
[
Math
⁢
89
]
then
:
PAM
⁡
(
t
)
=
(
SA
⁢
1
⁢
(
t
)
+
SA
⁢
2
⁢
(
t
)
+
D
⁢
P
⁢
H
)
2
[
Math
⁢
90
]
if
(
SA
⁢
1
⁢
(
t
)
+
SA
⁢
2
⁢
(
t
)
+
D
⁢
P
⁢
H
)
>
360
,
[
Math
⁢
91
]
then
:
PAM
⁡
(
t
)
=
(
SA
⁢
1
⁢
(
t
)
+
SA
⁢
2
⁢
(
t
)
+
D
⁢
P
⁢
H
)
-
3
⁢
6
⁢
0
2
[
Math
⁢
92
]
where SA1(t) is the value of the first angle value signal at time t, SA2(t) is the value of the second angle value signal at time t, and DPH is the predetermined phase shift value.

151 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/730,226Filed 8 Feb 2023
Priority: FR FR220144718 Feb 2022
Published: 30 Jul 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G01D 5/145
Using Hall-effect devices: influenced by the relative movement between the Hall device and magnetic fields
G01D 5/16
Influencing the magnitude of a current or voltage: by varying resistance
G01B 7/30
Measuring arrangements characterised by the use of electric or magnetic techniques: for measuring angles or tapers; for testing the alignment of axes
G01D 3/02
Indicating or recording apparatus with provision for the special purposes referred to in the subgroups: with provision for altering or correcting…