Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
  • B60C23/02—Signalling devices actuated by tyre pressure
  • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
  • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
  • B60C23/0415—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
  • B60C23/0416—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C19/00—Tyre parts or constructions not otherwise provided for
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
  • B60C23/02—Signalling devices actuated by tyre pressure
  • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
  • B60C23/0486—Signalling devices actuated by tyre pressure mounted on the wheel or tyre comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors
  • B60C23/0489—Signalling devices actuated by tyre pressure mounted on the wheel or tyre comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors for detecting the actual angular position of the monitoring device while the wheel is turning
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C19/00—Tyre parts or constructions not otherwise provided for
  • B60C2019/004—Tyre sensors other than for detecting tyre pressure

Definitions

• the present invention relates to a method and a device for locating wheels of a vehicle, in which or at least one wheel has wheel electronics. Moreover, the present invention relates to a tire pressure control system with such a device.
• the invention includes a method for Loka ⁇ taping of wheels of a vehicle, in which at least one wheel having a wheel electronics, wherein the vehicle side, the following steps are executed.
• a Sig nal ⁇ is received by the wheel electronic system that allows for conclusions to be a time point at which the wheel has assumed a first rotational angle ⁇ position.
• a first rotation angle information is generated.
• Second Wheelwinkelpositi ⁇ ones of the wheels are determined by sensors, which are each assigned to a specific position on the vehicle.
• Basie ⁇ end to the second rotational angle positions of second rotation angle information are provided.
• the first rotation angle information is compared with the second rotation angle information.
• the wheel associated with the wheel electronics is located depending on this comparison.
• the signal of a plurality of packets which are collected delayed emp ⁇ consists.
• the step of generating the first rotation angle information has the step of determining the
• At least one time interval between the packets is determined on the vehicle side and based on the determined at least one time interval, at least one estimated value for the at least one time interval is provided.
• each packet has a number indicating which rank the packet occupies within an order of the plurality of packets.
• the step of determining at least one temporal From ⁇ article between the packages can be executed multiple times and the determined time intervals can be stored accordingly.
• the method is executed in several consecutive periods and only the temporal ones Distances of the most recent n periods are stored, where n may be, in particular, a natural number.
• n may be, in particular, a natural number.
• This can be implemen ⁇ advantage for example by means of a ring buffer. In this way the storage space requirement is reduced.
• the step of providing at least one estimated value may comprise the step of forming at least one average value from the stored time intervals.
• the stored time intervals are thus averaged in this case in order to generate a more robust estimate in this way.
• the step of providing at least one estimated value comprises the following steps.
• a first product is calculated by multiplying the at least one time interval determined in a current period by a predetermined value that is between 0 and 1.
• a second product can be calculated by multiplying an estimate of a previous period by 1 minus the predetermined value.
• this preceding period may be the period immediately preceding the current period.
• the estimated value of the current period can then be calculated.
• the memory requirement is minimized because the at least one estimate is stored for only one period.
• the step of determining at least one temporal From ⁇ article between the packets is only performed in one embodiment, if the received signal covers all expected packets. In this way it should be prevented that due to a possible lack of a package incorrect time intervals are determined.
• the present invention comprises a device for locating wheels of a vehicle, wherein at least one wheel has wheel electronics.
• the device has a first receiving unit for receiving a signal from the wheel electronics, wherein the signal allows conclusions on ei ⁇ nen time at which the wheel has taken a first rotational angular position.
• a first processing unit is for generating a first rotation angle information based on the signal.
• a second receiving unit of the Vorrich ⁇ device is used to receive second angular positions of the wheels measured by sensors, which are each assigned to a specific position on the vehicle.
• the device comprises a second processing unit for providing ⁇ second rotational angle information based on the second rotational angular positions.
• An adjustment unit is set up to match the first rotation angle information with second rotation angle information.
• a localization unit serves to locate the wheel associated with the wheel electronics as a function of a result of the adjustment unit.
• the first receiving unit is set up to receive a signal which consists of several packets which are received in a time-shifted manner.
• the first processing unit is configured to determine a point of time when the wheel has assumed the first rotational angle position based on one of the plurality of packets.
• the apparatus comprises a proximity detection means at the Ermit- stuffs at least one time interval between the Pake ⁇ th.
• the apparatus comprises an estimation means for providing at least one estimated value for the at least one time interval based on the ermit ⁇ telten at least one time interval.
• the present invention comprises a tire ⁇ pressure control system with a device according to the invention.
• Figure la a vehicle from the side
• Figure lb is a schematic representation of the vehicle from below, are shown in the essential elements of a tire pressure monitoring system
• Figure 3 is a signal consisting of several packets
• Figure 4a shows an embodiment of an inventive
• Figure 4b is a sketch for explaining the matching and localizing
• FIG. 5 shows method steps of an embodiment of a method according to the invention
• Figure 6 further steps of an embodiment of a method according to the invention.
• Figure 7 further steps of another execution ⁇ of a method according to the invention.
• FIG. 1 a shows a vehicle 1 in a side view.
• the two wheels 2b and 2d can be seen.
• the same vehicle is shown in Figure lb again illustrated from below, we ⁇ sentliche elements of a tire pressure monitoring system characterizedkohl- are.
• the four wheels 2a to 2d each have wheel electronics 3a to 3d.
• the wheels 2a to 2d are each ⁇ Weil arranged on the vehicle side sensors 4a to 4d zugeord ⁇ net. These sensors may be, for example, ABS sensors or ESP sensors.
• the sensors 4a to 4d are connected to an embodiment of a device 5 according to the invention. This is among other things set up to receive signals from the wheel electronics 3a to 3d.
• FIG. 2 shows the wheel 2a again in a side view, wherein it can be seen that the wheel electronics 3a rotates when the wheel 2a rolls on the ground 6 with the wheel.
• the wheel unit 3a transmits a signal 7 shown in FIG. 3 and comprising packets 7a, 7b and 7c.
• the Radein- integrated 3a sends multiple packets because the vehicle side is located ⁇ receiver unit one or more of the packets for example due to shading can not receive possibly by Ka ⁇ rosse advised haste.
• the time t is plotted.
• the first rotational angular position This may ⁇ example, be the highest position in the wheel (0 °) or about the middle of the tire footprint (180 °) and the on or off ⁇ entry point trading into and out of the tire footprint.
• the first packet 7a is sent.
• the delay time dto may be predetermined or determined during operation by the wheel electronics.
• the packet 7a has been received completely on the vehicle side.
• the distance between the first packet 7a and the second packet 7b is dti and the distance between the second packet 7b and the third package 7c is dt 2 ⁇
• the second package 7b is at the time t 2 received completeness, ⁇ dig and 7c the package at the time t3.
• the distances between the packets dti and dt 2 are measured continuously. and on their basis, estimates of these distances are provided.
• the delay time dto is well known with reference to the clock of the wheel electronics.
• the ratio of the distance estimated by the vehicle dti compared to one of the wheel well known distance between the first and second package with respect to the clock of the wheel electronics dto can be adapted to any clock deviations. Knowing the delay time dto and the distances dti and dt 2 and the transmission durations for the packets 7a, 7b and 7c, it would be possible, for example, to calculate back from the time of reception t 3 of the third packet to the time to when the wheel assumed the first rotational angular position. To close from t 2 to to, only the distances dto and dti and the transmission durations of the packets 7a and 7b need to be known.
• the invention is not be limited ⁇ to a signal with three packages. Rather, any number of packets may be used as long as the number is at least two.
• FIG. 4 a shows an embodiment of a device for locating wheels of a vehicle, in which at least one wheel has wheel electronics.
• the device 8 shown comprises a first receiving unit 9 for receiving a signal from the wheel electronics, which allows conclusions to a time ⁇ point to where the wheel has taken a first Wheelwinkelpositi ⁇ on.
• the receiving unit is turned rich ⁇ tet to receive a signal that consists of a plurality of packets that are received at different times.
• the device 8 has a first processing unit 10 for generating a first rotation angle information based on the signal. This is set up to determine, based on one of the several packets, a time to when the wheel has assumed the first rotational angle position.
• the first processing unit 10 is connected to a distance-determining device 11 for determining at least one time interval between the packets and an estimating device 12 for providing at least one estimated value for the at least one time interval based on the determined at least one time interval.
• the device 8 comprises a second receiving unit 13 for receiving rotational angular positions of the wheels measured by sensors which are each assigned to a specific position on the vehicle. It may be ABS or ESP sensors beispielswei ⁇ se.
• a second processing unit 14 provides second rotational angle information based on the second rotational angle positions. This may in particular be the time points at which the view of the sensors, the associated wheel has assumed the second rotation angle ⁇ position, which preferably corresponds to the first rotational angular position.
• a matching unit 15 uses the first Drehwinkelinfor ⁇ mation of the first processing unit 10 and the second rotation angle information of the second processing unit 14, and compares them with each other from. Depending on the result of the balancing unit 15, the locating unit 16 locates the wheel associated with the wheel electronics.
• FIG. 4b shows the top wheel 2c with a Radelektro ⁇ technology 3c, which is currently in the first rotational angular position.
• the first rotational angle information indicates when the wheel electronics 3c was in the first rotational angular position. In the present example, the first rotational angle information thus corresponds to.
• time bars are plotted for each of the four wheels 2a-2d.
• the bar Bl indicates that the wheel 2a was at the second rotational angular position at time t a .
• the beam B2 indicates that the wheel 2b was at the second rotational angular position at the time t.
• the bars B3 and B4 correspond to the wheels 2c and 2d.
• the wheel has 2c at time t c taken the second rotational angular position, while the wheel 2d in this second Drehwinkelpo ⁇ sition at the time t d was located.
• the wheels 2a-2d with their wheel electronics 3a-3d are shown at the time t0.
• the wheel ⁇ electronics 3a is located at the time to even before the second rotational angular position ßi. Consequently, it goes through the rotation angle position to to, as the beam Bl illustrates.
• the wheel electronics 3b has already passed through the second rotational angle position ⁇ 2.
• the wheel electronics 3 c is from the perspective of the sensor, which is assigned to the corresponding position on the vehicle, at the time to almost exactly in the second rotational angular position ß 3 .
• the wheel electronics t d has already passed through the second rotational angle position ⁇ 4 for the longest time.
• the time t c is closest to the time t, so that it can be closed by a corresponding ⁇ the comparison that the wheel electronic system that has transmitted the received signal, the wheel electronics is 3c, which is associated with the wheel 2c.
• the deviate ⁇ tions between tO and tc may in particular arise from measurement inaccuracies in the process.
• FIG. 5 shows steps of an embodiment of a method according to the invention.
• step S1 first a first rotational angular position of a wheel is determined to which the wheel electronics are assigned.
• step S2 a signal is then sent from the wheel electronics to a vehicle-side receiver, which allows conclusions to a point in time at which the wheel has assumed the first rotational angular position. This signal is received in step S3.
• a first rotation ⁇ angle information is generated in step S4. This includes determining the point in time at which the wheel has assumed the first rotational angular position. This is based on one of several packages.
• step S5 second rotational angular positions of the wheels are determined by sensors each associated with a specific position on the vehicle. Based on the rotational angular positions ⁇ sen second second rotation angle information is provided (step S6). Subsequently, in step S7, the first rotational angle information is compared with the second rotational angle information so as to localize the wheel associated with the wheel electronics in step S8 as a function of this comparison.
• FIG. 6 illustrates an embodiment of a routine which provides an estimated value for the method according to the invention.
• step S9 a time interval between the receiving packets is determined.
• step S10 At least one estimated value for the at least one time interval is then provided based on the determined at least one time interval. Using this estimate can gens a first rotational angle information S4 said time take place in the step of Erzeu- based on the at least one estimated value for the at least one time interval and the number of a Pa ⁇ Ketes.
• FIG. 7 shows a further embodiment of a routine which provides an estimated value for the method according to the invention.
• a current time interval A t is determined in step S in the current period t.
• the estimate is due to this current time interval A t in step S12 based on the following formula S t of aktuel ⁇ len determined period:
• each of the packets can be used to draw conclusions about the time to zie ⁇ hen, to which the wheel has assumed the first rotational angular position.
• the time intervals can be repeated ermit ⁇ telt so that deviations of the clocks of the wheel units with each other and their inaccuracies are compensated. In this way, a faster localization of wheels of a vehicle can be achieved.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Measuring Fluid Pressure (AREA)
• Arrangements For Transmission Of Measured Signals (AREA)

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Publications (1)

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Cited By (3)

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Citations (4)

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• 2013
  • 2013-06-14 DE DE102013211152.5A patent/DE102013211152A1/de not_active Withdrawn
• 2014
  • 2014-06-11 JP JP2016518474A patent/JP6391679B2/ja active Active
  • 2014-06-11 EP EP14729023.3A patent/EP3007916B1/de active Active
  • 2014-06-11 KR KR1020167000964A patent/KR101867740B1/ko active Active
  • 2014-06-11 CN CN201480033750.7A patent/CN105307877B/zh active Active
  • 2014-06-11 WO PCT/EP2014/062151 patent/WO2014198785A1/de not_active Ceased
  • 2014-06-11 US US14/898,190 patent/US10173479B2/en active Active

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