AU2018366851B2 - Sensor device - Google Patents
Sensor device Download PDFInfo
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- AU2018366851B2 AU2018366851B2 AU2018366851A AU2018366851A AU2018366851B2 AU 2018366851 B2 AU2018366851 B2 AU 2018366851B2 AU 2018366851 A AU2018366851 A AU 2018366851A AU 2018366851 A AU2018366851 A AU 2018366851A AU 2018366851 B2 AU2018366851 B2 AU 2018366851B2
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- sensor device
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- compensation coils
- receiving
- coil
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/02—Electric devices associated with track, e.g. rail contacts
- B61L1/08—Electric devices associated with track, e.g. rail contacts magnetically actuated; electrostatically actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/162—Devices for counting axles; Devices for counting vehicles characterised by the error correction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/163—Detection devices
- B61L1/165—Electrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/167—Circuit details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
- G01V3/105—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops
- G01V3/107—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops using compensating coil or loop arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention relates to a sensor device (1) for sensing a change in a magnetic field, which change is caused by an object approaching the sensor device (1) in a longitudinal direction (L) or moving past the sensor device (1) in the longitudinal direction (L). According to the invention, the sensor device (1) comprises at least one receiving coil (10), an AC-fed transmitting coil (30) arranged upstream or downstream of the receiving coil (10) based on the longitudinal direction (L) and two compensation coils (11, 12), one of which is arranged upstream of the transmitting coil (30) and the other of which is arranged downstream of the transmitting coil (30) based on the longitudinal direction (L), the two compensation coils (11, 12) are each permeated by the magnetic field generated by the transmitting coil (30) and are electrically connected in series in such a manner that the voltages induced in the two compensation coils (11, 12) by the magnetic field of the transmitting coil (30) have different signs, and the receiving coil (10) and the two compensation coils (11, 12) are electrically connected in series, wherein the electrical polarity of the coils is selected in such a manner that a magnetic interference field (M) acting on the receiving coil (10) and the two compensation coils (11, 12) induces a voltage in the receiving coil (10) with a sign which differs from that in the two compensation coils (11, 12).
Description
Description
Sensor device
The invention relates to sensor devices for sensing magnetic field changes, in particular for detecting objects approaching the sensor device or passing same.
A sensor device based on the sensing of a magnetic field change resulting from an iron wheel of a railroad vehicle traveling over a track is described in the German published patent application DE 10137 519 Al for example.
In the field of railroad technology, magnetic interference fields are produced to a significant degree by electric rail currents, which are injected in to the track by electric railroad vehicles or respectively electric locomotives.
Aspects of the present disclosure provide a sensor device which is as insensitive as possible to magnetic interference fields, and also enables reliable object identification even in the case of an interference field influence.
According to an aspect of the present invention, there is provided a sensor device for sensing a change in a magnetic field, which change is caused by an object approaching the sensor device in a longitudinal direction or moving past the sensor device in the longitudinal direction, wherein - the sensor device comprises at least one receiving coil, an AC-fed transmitting coil arranged upstream or downstream of the receiving coil based on the longitudinal direction and two compensation coils, one of which is arranged upstream of the transmitting coil and the other of which is arranged downstream of the transmitting coil based on the longitudinal direction, the two compensation coils are each permeated by the magnetic field generated by the transmitting coil and are electrically connected in series in such a manner that the voltages induced in the two compensation coils by the magnetic field of the transmitting coil have different signs, and - the receiving coil and the two compensation coils are electrically connected in series, wherein the electrical polarity of the coils is selected in such a manner that a magnetic interference field acting on the receiving coil and the two compensation coils induces a voltage in the receiving coil with a sign which differs from that in the two compensation coils.
According to an aspect of the present invention, there is provided an arrangement with a rail, wherein the sensor device is a sensor device as claimed in any one of the preceding claims and the sensor device is mounted on the rail in such a manner that the longitudinal direction of the sensor device corresponds to the longitudinal direction of the rail.
Accordingly, an aspect of the present disclosure provides that the sensor device comprises at least one receiving coil, an AC-fed transmitting coil arranged upstream or downstream of the receiving coil based on the longitudinal direction of the sensor device, and two compensation coils, one of which is arranged upstream and the other downstream of the transmitting coil based on the longitudinal direction, the two compensation coils are each permeated by the magnetic field generated by the transmitting coil and are electrically connected in series in such a manner that the voltages induced in the two compensation coils by the magnetic field of the transmitting coil have different signs, and the receiving coil and the two compensation coils are electrically connected in series, wherein the electrical polarity of the coils is selected in such a manner that a magnetic interference field acting on the receiving coil and the two compensation coils induces a voltage in the receiving coil with a sign which differs from that in the two compensation coils.
One advantage of a sensor device of the present disclosure can be seen in the fact that the arrangement of the two compensation coils, the electrical connection of the compensation coils to the receiving coil, and the resulting variability of the voltages make it possible to completely or at least substantially suppress, during signal sensing, an interference field (e.g. a magnetic field of a rail current) which is permeating the coils.
In the case of an established magnetic field change the sensor device preferably generates an object identification signal which indicates an object approaching or moving past. The object identification signal can be generated for example whenever falling electric voltage at the series connection of the receiving coil and the compensation coils reaches or exceeds a predetermined threshold or changes abruptly.
PCT/EP2018/078139 / 2017P18986WO
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The longitudinal axis of the transmitting coil preferably lies
parallel or at least essentially parallel to the longitudinal
direction of the sensor device, or itself forms the
longitudinal direction of the sensor device.
The longitudinal axis of the receiving coil and that of the
two compensation coils are preferably each aligned
perpendicular or at least essentially perpendicular to the
longitudinal axis of the transmitting coil.
The two compensation coils are preferably each arranged and/or
dimensioned in such a manner that the magnetic field generated
by the transmitting coil induces equally large voltages with
different signs in the two compensation coils (corresponding
to a phase shift of 1800).
The two compensation coils preferably have the same
construction and are arranged in mirror symmetry with regard
to the transmitting coil.
It is also regarded as advantageous if the receiving coil and
the two compensation coils are arranged and/or dimensioned in
such a manner that the voltage induced in the receiving coil
by the magnetic interference field is as large as the sum
voltage formed by the voltages induced in the two compensation
coils, and the voltage induced by the interference field has a
value of zero or at least approximately zero at the series
connection consisting of the receiving coil and the two
compensation coils.
PCT/EP2018/078139 / 2017P18986WO
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With regard to the electrical connection of the coils, it is
considered advantageous if at least one capacitor is connected
in parallel with the series connection of the two compensation
coils and together with same forms a compensating oscillating
circuit, at least one capacitor is connected in parallel with
the receiving coil and together with same forms a receiving
oscillating circuit, and the resonance frequency of the
compensating oscillating circuit and the resonance frequency
of the receiving oscillating circuit are the same or the
resonance frequency range of the compensating oscillating
circuit at least overlaps with the resonance frequency range
of the receiving oscillating circuit.
The sensor device can be implemented as two-channel. In this
case the aforesaid two compensation coils and the aforesaid
receiving coil preferably form a first channel of the sensor
device. Two further compensation coils and a further receiving
coil preferably form a second channel of the sensor device,
with one of the two further compensation coils being arranged
upstream and the other downstream of the transmitting coil,
and the transmitting coil being arranged between the two
receiving coils.
Additionally, provision can be made advantageously for the
compensation coils or at least one of them and/or the
receiving coil(s) to each be formed out of two or more coil
sections which are electrically connected to each other.
Moreover the invention relates to an arrangement with a rail,
in particular a railroad rail, on which a sensor device as
described above is mounted.
PCT/EP2018/078139 / 2017P18986WO
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It is advantageous if the sensor device is mounted on the rail
in such a manner that the longitudinal direction of the sensor
device and/or the longitudinal direction (or respectively the
longitudinal axis) of the transmitting coil of the sensor
device corresponds to the longitudinal direction of the rail.
The receiving coil or receiving coils and the transmitting
coil preferably lie in the same horizontal plane. The
compensation coils preferably likewise lie in a horizontal
plane, whether the same plane as the transmitting coil or
another plane, in particular parallel to same.
A preferred embodiment provides for the spacing of the
compensation coils from the rail head to be greater than the
spacing of the receiving coil or receiving coils. It is
advantageous in an embodiment of this type if the compensation
coils lie in a horizontal plane that lies at a deeper level
than the horizontal plane in which the receiving coil or
receiving coils and the transmitting coil lie.
An exemplary embodiment regarded as particularly advantageous
provides for the receiving coil or receiving coils and the
compensation coils to each be inclined compared to the
horizontal, or respectively the longitudinal axes of the said
coils compared to the vertical, wherein the receiving coil or
receiving coils face toward the rail head and the compensation
coils face away from the rail head.
The invention is explained in detail below on the basis of
exemplary embodiments; in this respect the following show by
way of example:
PCT/EP2018/078139 / 2017P18986WO
6
Figure 1 A railroad rail on which an exemplary embodiment of
a single-channel sensor device is mounted,
Figure 2 The electric circuitry of the components of the
sensor device shown in Figure 1 in the form of an
electrical circuit diagram, and
Fig. 3-6 Exemplary embodiments of two-channel sensor devices
which are mounted on a rail.
For the sake of clarity, the same reference symbols are always
used for identical or comparable components in the figures.
Figure 1 shows an exemplary embodiment of a single-channel
sensor device 1 which is suitable for sensing magnetic field
changes and for sensing objects such as iron wheels of
railroad vehicles for example. In the event of identifying an
object the sensor device 1 generates an object identification
signal.
The sensor device 1 comprises a receiving coil 10, two
compensation coils 11, 12, and a transmitting coil 30. The
transmitting coil is driven with the aid of an AC voltage Us
(see Fig. 2); a capacitor C can be connected in parallel with
the transmitting coil (see Fig 2).
The receiving coil 10 can be arranged upstream or downstream
of the transmitting coil 30 - based on the longitudinal
direction L of the sensor device 1. In the exemplary
embodiment shown in Figure 1 the receiving coil 10 is located
downstream of the transmitting coil 30 when viewed in the
longitudinal direction L. The longitudinal direction L30 of
PCT/EP2018/078139 / 2017P18986WO
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the transmitting coil 30 defines the longitudinal direction L
of the sensor device.
One of the two compensation coils 11 and 12 - again based on
the longitudinal direction L - is positioned upstream and the
other downstream of the transmitting coil 30.
The sensor device 1 is attached on a side wall of a rail 40
which is suitable for guiding a railroad vehicle, and can be a
railroad rail for example. The sensor device 1 is located
below the rail head 50 of the rail 40. The components of the
sensor device 1 are preferably accommodated in a housing 70
which is fixed, for example bolted on, to the side wall of the
rail 40.
Moreover Figure 1 shows a magnetic interference field M which
can be produced for example by an electric rail current
flowing through the rail 40. A rail current of this type
usually occurs when an electrically driven railroad vehicle
travels over the rail 40.
In the case of the exemplary embodiment shown in Figure 1 the
longitudinal axis L10 of the receiving coil 10, the
longitudinal axis L11 of the compensation coil L11, and the
longitudinal axis L12 of the compensation coil 12 is aligned
perpendicular or at least essentially perpendicular (± 15°) to
the longitudinal direction L of the sensor device 10.
With the aim of detecting vehicles traveling on the rail 40
the arrangement of the sensor device 1 on the rail 40 is
selected in such a manner that the longitudinal direction L of
the sensor device 1 and therefore the longitudinal direction
PCT/EP2018/078139 / 2017P18986WO
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L10 of the transmitting coil 30 lies parallel to the
longitudinal direction of the rail 40.
The magnetic field generated by the transmitting coil 30
preferably generates equally sized voltages with different
signs in the two compensation coils. The different signs of
the voltages are already produced by the circumstance that one
of the compensation coils is arranged upstream and the other
downstream of the transmitting coil 30, and to this degree the
direction of the magnetic field in the two compensation coils
11 and 12 is different. Equal-sized voltages induced by the
magnetic field of the transmitting coil 30 can be achieved
particularly easily if the two compensation coils 11 and 12
have the same construction and are arranged in mirror symmetry
with regard to the transmitting coil 30.
To prevent errors in detection, or respectively to minimize
the influence of the magnetic interference field M on the
generation of an object identification signal, the arrangement
and dimensioning of the receiving coil 30 is coordinated with
the arrangement and dimensioning of the two compensation coils
11 and 12, and in fact in such a manner that the voltage
induced in the receiving coil 10 by the magnetic interference
field M is as large as the sum voltage induced in the two
compensation coils 11 and 12 by the magnetic interference
field M, and moreover has the opposite sign.
The two compensation coils 11 and 12 preferably lie in the
same plane, which is identified in Figure 1 by the reference
symbol 80. The recording coil 10 and the transmitting coil 30
preferably likewise lie in a common plane, which bears the
reference symbol 90 in Figure 1. In the exemplary embodiment
PCT/EP2018/078139 / 2017P18986WO
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shown in Figure 1 the plane 80 lies below the plane 90 in
spatial terms. In other words the distance of the compensation
coils 11 and 12 from the head of the rail 50 is greater than
the distance of the receiving coil 10 and the transmitting
coil 30 from the head of the rail in the exemplary embodiment
shown in Figure 1.
Figure 2 specifically shows the electric circuitry for the
coils of the sensor device 1 in detail. It can be seen that
the two compensation coils 11 and 12 are connected
electrically in series, and in fact in such a manner that the
voltages induced in the two compensation coils 11 and 12 by
the magnetic field of the transmitting coil 30 have different
signs. The magnetic field of the transmitting coil 30 does not
result in a sum voltage (compensation voltage) Ucompl at the
series connection of the two compensation coils 11 and 12
therefore.
Moreover Figure 2 shows that the receiving coil 10 and the
series connection made up of the two compensation coils 11 and
12 are likewise electrically connected in series, with the
electrical polarity of the coils being selected in such a
manner that a magnetic interference field M acting upon the
receiving coil 10 and the two compensation coils 11 and 12
(see Figure 1) induces a voltage with a different sign in the
receiving coil 10 than in the two compensation coils 11 and
12. It is advantageous if the voltage Uel induced in the
receiving coil 10 by the interference field M is as large as
the sum voltage Ucompl at the series connection made up of the
two compensation coils 11 and 12; in this case the total
voltage Ul through the magnetic field M is zero or at least
approximately zero.
PCT/EP2018/078139 /2017P18986WO
10
Ul = Ucompl + Uel 0
The variation in the signs of the voltages Ucompl and Uel - in
the case of induction of a voltage by the magnetic
interference field M - is achieved by the electrical
connection of the coils relative to each other as shown in
Figure 2.
A first capacitor Cl is preferably situated in parallel with
the receiving coil 10, and a second capacitor C2 is preferably
situated in parallel with the series connection made up of the
compensation coils 11 and 12. The first capacitor Cl forms,
together with the receiving coil 10, a receiving oscillating
circuit SE with a resonance frequency fl. The second capacitor
C2 forms, together with the series connection made up of the
two compensation coils 11 and 12, a compensation oscillating
circuit SK with a resonance frequency f2.
With the aim of creating a good compensation effect by the two
compensation coils 11 and 12, it is advantageous if the
resonance frequency fl of the receiving oscillating circuit SE
and the resonance frequency f2 of the compensation oscillating
circuit SK are the same size or the resonance frequency ranges
of the two oscillating circuits at least overlap.
To damp the oscillating circuits SE and SK, resistances R1 or
respectively R2 can be connected in series with the capacitors
Cl and C2.
The total voltage Ul at the series connection of the coils 10,
11 and 12 can be evaluated for generating an object
PCT/EP2018/078139 / 2017P18986WO
11
identification signal: for example the object identification
signal can be generated when the total voltage Ul changes
abruptly or reaches or exceeds a predetermined threshold
value.
Figure 3 shows an exemplary embodiment of a two-channel sensor
device 1 which is mounted on a rail 40. In contrast to the
sensor device 1 shown in Figure 1, the sensor device 1 shown
in Figure 3 has a two-channel configuration and has two
receiving channels A and B. The receiving channel A is formed
by the receiving coil 10 and the two compensation coils 11 and
12, whose arrangement, mode of functioning, and electrical
connection have already been explained in conjunction with
Figures 1 and 2.
Channel B of the sensor device 1 is formed by means of a
further receiving coil 20 and also two further compensation
coils 21 and 22, whose arrangement is in mirror symmetry to
the arrangement of the coils in channel A. The implementations
relating to the receiving coil 10 and the compensation coils
11 and 12 in conjunction with Figures 1 and 2 therefore apply
correspondingly to the second receiving coil 20 and the
further compensation coils 21 and 22.
In the exemplary embodiment shown in Figure 3 the compensation
coils 11, 12, 21, and 22 lie in the same plane 80, and in fact
one behind the other when viewed in the longitudinal direction
L of the sensor device 1 or respectively in the longitudinal
direction of the rail 40.
Figure 4 shows a further exemplary embodiment of a two-channel
sensor device 1 which is being traveled over by a wheel rim
PCT/EP2018/078139 / 2017P18986WO
12
130 of an iron wheel 120. The sensor device 1 shown in Figure
4 has the components already explained in conjunction with
Figure 3, that is to say a transmitting coil 30, two receiving
coils 10 and 20, and also four compensation coils 11, 12, 21,
and 22. With regard to the mode of functioning of the coils,
the comments made in conjunction with Figures 1 to 3 for the
exemplary embodiment shown in Figure 4 apply correspondingly.
In contrast to the exemplary embodiment shown in Figure 3 the
compensation coils in the embodiment variant shown in Figure 4
lie in pairs adjacent to each other (when viewed along the
longitudinal direction of the rail). Thus it can be seen that
the compensation coils 11 and 21 do in fact lie in the same
plane 80, but the spacing of the compensation coil 11 from the
rail 40 is smaller than the spacing of the compensation coil
21. The compensation coil 11 can therefore be designated as
the inner compensation coil and the compensation coil 21 as
the outer compensation coil. The compensation coils 12 and 22
are arranged adjacent to each other in a similar manner.
Figure 5 shows an exemplary embodiment of a two-channel sensor
device 1 in which the planes 80 and 90, in which the receiving
coils and the compensation coils are situated, are each
inclined compared to the horizontal; the longitudinal axes of
the receiving coil and the compensation coils are therefore
inclined compared to the vertical. Thus it can be seen in
Figure 5 that the receiving coil 10 or respectively its
longitudinal axis L10 is facing toward the rail head 50 of the
rail 40, whereas the compensation coils 11 and 21 or
respectively their the longitudinal axes L11 and L21 are
facing away from the rail head 50. The receiving coil 20,
which is not shown in Figure 5, and the compensation coils 12
PCT/EP2018/078139 / 2017P18986WO
13
and 22, likewise not shown, are likewise arranged inclined in
a corresponding manner.
The inclination of the receiving coils 10 and 20 toward the
wheel flange or respectively rail head 50 results in a
particularly high level of sensitivity of the receiving coils
being achieved; the opposite inclination of the compensation
coils 11, 12, 21, and 22 reduces the influence of the rail
head 50 on the compensation coils.
Figure 6 shows an exemplary embodiment of a two-channel sensor
device 1 in which the compensation coils 11, 12, 21, and 22
are each distanced further from the transmitting coil 30 than
the receiving coils 10 and 20. In the embodiment shown in
Figure 6 all the coils 10, 11, 12, 20, 22, and 30 can be
arranged in the same plane and each have the same vertical
spacing from the rail head 50 of the rail 40. In the exemplary
embodiment shown in Figure 6 the coils 10, 11, and 12 belong
to one receiving channel and the coils 20, 21, and 22 to a
second receiving channel.
Although the invention has been closely illustrated and
described in detail by means of preferred exemplary
embodiments, the invention is not limited by the examples
disclosed, and other variations can be derived from same by a
person skilled in the art without departing from the scope of
protection of the invention.
Claims (15)
1. A sensor device for sensing a change in a magnetic field, which change is caused by an object approaching the sensor device in a longitudinal direction or moving past the sensor device in the longitudinal direction, wherein - the sensor device comprises at least one receiving coil, an AC-fed transmitting coil arranged upstream or downstream of the receiving coil based on the longitudinal direction and two compensation coils, one of which is arranged upstream of the transmitting coil and the other of which is arranged downstream of the transmitting coil based on the longitudinal direction, - the two compensation coils are each permeated by the magnetic field generated by the transmitting coil and are electrically connected in series in such a manner that the voltages induced in the two compensation coils by the magnetic field of the transmitting coil have different signs, and - the receiving coil and the two compensation coils are electrically connected in series, wherein the electrical polarity of the coils is selected in such a manner that a magnetic interference field acting on the receiving coil and the two compensation coils induces a voltage in the receiving coil with a sign which differs from that in the two compensation coils.
2. The sensor device as claimed in claim 1, wherein - the longitudinal axes of the receiving coil and the two compensation coils are each aligned perpendicular or at least essentially perpendicular to the longitudinal axis of the transmitting coil, and - the longitudinal axis of the transmitting coil is aligned parallel or at least essentially parallel to the longitudinal direction of the sensor device.
3. The sensor device as claimed in any one of the preceding claims, wherein the two compensation coils are each arranged and/or dimensioned in such a manner that the magnetic field generated by the transmitting coil induces equally large voltages with different signs in the two compensation coils.
4. The sensor device as claimed in any one of the preceding claims, wherein the two compensation coils have the same construction and are arranged in mirror symmetry with regard to the transmitting coil.
5. The sensor device as claimed in any one of the preceding claims, wherein the receiving coil and the two compensation coils are arranged and/or dimensioned in such a manner that - the voltage induced in the receiving coil by the magnetic interference field is as large as the sum voltage formed by the voltages induced in the two compensation coils, and - the voltage induced by the interference field has a value of zero or at least approximately zero at the series connection consisting of the receiving coil and the two compensation coils.
6. The sensor device as claimed in any one of the preceding claims, wherein at least one capacitor is connected in parallel with the series connection of the two compensation coils and together with same forms a compensating oscillating circuit, at least one capacitor is connected in parallel with the receiving coil and together with same forms a receiving oscillating circuit, and the resonance frequency of the compensating oscillating circuit and the resonance frequency of the receiving oscillating circuit are the same or the resonance frequency range of the compensating oscillating circuit at least overlaps with the resonance frequency range of the receiving oscillating circuit.
7. An arrangement as claimed in any one the preceding claims wherein at least one of the compensation coils and/or at least one receiving coil is formed out of two or more coil sections which are electrically connected to each other.
8. The sensor device as claimed in any one of the preceding claims, wherein - the sensor device is two-channel, - two compensation coils and the receiving coil form a first channel of the sensor device, - two further compensation coils and a further receiving coil form a second channel of the sensor device,
- one of the two further compensation coils is arranged upstream and the other downstream of the transmitting coil, and - the transmitting coil is arranged between the receiving coils.
9. An arrangement with a rail, wherein the sensor device is a sensor device as claimed in any one of the preceding claims and the sensor device is mounted on the rail in such a manner that the longitudinal direction of the sensor device corresponds to the longitudinal direction of the rail.
10. An arrangement as claimed in claim 9, wherein the receiving coil or receiving coils and the transmitting coil lie in the same horizontal plane.
11. The arrangement as claimed in any one of the preceding claims 9 to 10, wherein the compensation coils lie in the same horizontal plane.
12. The arrangement as claimed in any one of the preceding claims 9 to 11 wherein the spacing of the compensation coils from the rail head is greater than the spacing of the receiving coil or receiving coils from the rail head.
13. The arrangement as claimed in any one of the preceding claims 9 to 12, wherein the compensation coils lie in a horizontal plane that lies at a deeper level than the horizontal plane in which the receiving coil or receiving coils and the transmitting coil lie.
14. The arrangement as claimed in any one of the preceding claims 9 to 13, wherein the receiving coil or receiving coils and the compensation coils are each inclined relative to the horizontal, or respectively their longitudinal axes relative to the vertical, wherein the receiving coil or receiving coils face toward the rail head and the compensation coils face away from the rail head.
15. The arrangement as claimed in any one of the preceding claims 9 to 14, wherein the rail is a railroad rail.
Siemens Mobility GmbH Patent Attorneys for the Applicant/Nominated Person SPRUSON&FERGUSON
FIG 3
50
FIG 4 I 1
I
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017220281.5 | 2017-11-14 | ||
| DE102017220281.5A DE102017220281A1 (en) | 2017-11-14 | 2017-11-14 | sensor device |
| PCT/EP2018/078139 WO2019096514A1 (en) | 2017-11-14 | 2018-10-16 | Sensor device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2018366851A1 AU2018366851A1 (en) | 2020-04-30 |
| AU2018366851B2 true AU2018366851B2 (en) | 2020-12-24 |
Family
ID=64023997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2018366851A Active AU2018366851B2 (en) | 2017-11-14 | 2018-10-16 | Sensor device |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP3681777B1 (en) |
| CN (1) | CN111315628B (en) |
| AU (1) | AU2018366851B2 (en) |
| DE (1) | DE102017220281A1 (en) |
| ES (1) | ES2887281T3 (en) |
| PL (1) | PL3681777T3 (en) |
| WO (1) | WO2019096514A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021206585A1 (en) | 2021-06-25 | 2022-12-29 | Siemens Mobility GmbH | Sensor device, rail vehicle and sensor arrangement |
| DE102021212809A1 (en) | 2021-11-15 | 2023-05-17 | Siemens Mobility GmbH | Sensor device and method for detecting a change in magnetic field |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009053257A1 (en) * | 2009-11-05 | 2011-05-12 | Siemens Aktiengesellschaft | wheel sensor |
| DE102012212939A1 (en) * | 2012-07-24 | 2014-01-30 | Siemens Aktiengesellschaft | Wheel sensor, particularly for train detection system, has inductive sensor for detecting magnetic field change as result of iron wheels of rail vehicle, where inductive sensor is arranged at side of rail of track |
| DE102014207409A1 (en) * | 2014-04-17 | 2015-10-22 | Siemens Aktiengesellschaft | Sensor device for detecting a change in magnetic field and conditioning the track-bound traffic with at least one such sensor device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10137519A1 (en) | 2001-07-30 | 2003-02-13 | Siemens Ag | Wheel sensor for a unit signaling a clear railway line has an inductive sensor on a railway line to detect a change in a magnetic field as the iron wheels of a railway vehicle pass over a rail |
| CN103552581B (en) * | 2013-11-12 | 2016-01-13 | 哈尔滨理工大学 | Wheel sensor |
| CN105818838B (en) * | 2016-04-22 | 2018-04-24 | 北京永列科技有限公司 | A kind of axle count sensor and meter shaft detection method |
| CN106994985A (en) * | 2017-03-14 | 2017-08-01 | 哈尔滨工业大学 | A kind of unilateral axle count sensor based on electromagnetic induction principle |
-
2017
- 2017-11-14 DE DE102017220281.5A patent/DE102017220281A1/en not_active Withdrawn
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2018
- 2018-10-16 CN CN201880072373.6A patent/CN111315628B/en active Active
- 2018-10-16 PL PL18793600T patent/PL3681777T3/en unknown
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- 2018-10-16 EP EP18793600.0A patent/EP3681777B1/en active Active
- 2018-10-16 ES ES18793600T patent/ES2887281T3/en active Active
- 2018-10-16 WO PCT/EP2018/078139 patent/WO2019096514A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009053257A1 (en) * | 2009-11-05 | 2011-05-12 | Siemens Aktiengesellschaft | wheel sensor |
| DE102012212939A1 (en) * | 2012-07-24 | 2014-01-30 | Siemens Aktiengesellschaft | Wheel sensor, particularly for train detection system, has inductive sensor for detecting magnetic field change as result of iron wheels of rail vehicle, where inductive sensor is arranged at side of rail of track |
| DE102014207409A1 (en) * | 2014-04-17 | 2015-10-22 | Siemens Aktiengesellschaft | Sensor device for detecting a change in magnetic field and conditioning the track-bound traffic with at least one such sensor device |
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|---|---|
| EP3681777B1 (en) | 2021-06-16 |
| AU2018366851A1 (en) | 2020-04-30 |
| CN111315628B (en) | 2022-04-01 |
| WO2019096514A1 (en) | 2019-05-23 |
| EP3681777A1 (en) | 2020-07-22 |
| ES2887281T3 (en) | 2021-12-22 |
| CN111315628A (en) | 2020-06-19 |
| PL3681777T3 (en) | 2021-12-27 |
| DE102017220281A1 (en) | 2019-05-16 |
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