Classifications

• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
  • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
  • G05G1/30—Controlling members actuated by foot
  • G05G1/38—Controlling members actuated by foot comprising means to continuously detect pedal position

Definitions

• Pedal unit non-contact sensor for detecting a movement of a pedal, transducer device, sensor element and method for producing a pedal unit
• the invention relates to a pedal unit or a non-contact sensor for detecting a movement of a pedal or a transducer device or a
• a sensor module can be arranged in a hollow axle of a pedal module, wherein magnets around the
• Sensor module are arranged around in recesses of the pedal unit. The magnets rotate with the pedal and thus around the sensor.
• the Sensor can be realized without negative influence on the sensor signal.
• the sensor element can be mounted according to the invention with low acceptable tolerances without contact in front of the encoder.
• established, available and inexpensive so-called shaft end angle sensors can be used. This integration allows the use of geometric-identical
• Encoder shaft and the sensor for both left and right-hand pedals A variance between different types of pedals of different vehicles or platforms can thus be realized by adapting only the encoder shaft, without geometrically changing the non-contact sensors.
• a pedal unit in the present case is the unit that is installed in the vehicle to mount the pedal.
• the pedal unit therefore comprises a rigid part, which is referred to as a positional block, and the movable pedal.
• Bermmgungsquest sensor is provided in this pedal unit.
• the pedal can because as a brake pedal or a gas or
• the pedal unit and the pedal are usually made of steel in the case of brake pedals and in the case of clutch or accelerator pedals usually made of plastic.
• the pedal is around a hollow axle of the
• the non-contact sensor for example, from a donor magnet than the
• Encoder which can also include several individual magnets, and a
• Sensor element for detecting the magnetic field is usually used to detect the movement of the pedal about this hollow axis.
• movement is meant in the present case a rotary and / or linear movement of the pedal.
• the encoder is usually understood to mean a transmitter magnet.
• other sensor principles are possible,
• an optical sensor which can be used in visible and / or invisible light, an ultrasonic sensor or the use of electromagnetic waves. Furthermore, the use of a sensor based on eddy current is possible.
• the sensor element is usually a Hall sensor or a so-called AMR sensor, which contains an anisotropic magnetoresistive sensor element.
• Anisotropic magnetoresistive sensor elements are thin film sensors made of a feromagnetic material, such as Permaloi, whose resistance to electrical current flow depends on the angle between a current direction of the current flow and a magnetic field direction in the plane of the thin film. Also called GMR (giant magneto resistive) -
• the sensor element not only includes the sensors for detecting the magnetic field, but also a corresponding evaluation chip, which can be integrated with the sensor element. This evaluation chip then enables the delivery of the sensor signal for further evaluation, wherein this evaluation chip can already carry out a preliminary evaluation. If another sensor principle is used, that is
• a suitable light receiver is used as a sensor element in an ultrasonic sensor, an ultrasonic transducer and the use of electromagnetic waves, a suitable radio receiver.
• the air gap between the transmitter and the sensor element is typically between 1 and 4 mm.
• the air gap is presently necessary because the encoder rotates with the shaft and the pedal relative to the sensor element. This rotation leads in the case of a magnetic field sensor to a magnetic field change and can be detected by the sensor element, so that the rotation can be measured, in order to be further processed as a driver's request.
• the non-contact sensor is preferably a magnetic field sensor which has the sensor element and the encoder magnet with the shaft. contactless In the present case, this means that there is no direct positive or positive or material connection between the transmitter and the sensor element, but the transmitter and the sensor element are separated by an air gap.
• the shaft on which the encoder is arranged is preferably made of a non-magnetic metal. The shaft is guided and stored in the hollow axle. The leadership can be achieved, for example, by a corresponding metal bushing, with other materials can be used instead of metal.
• the guide can alternatively be achieved by a corresponding design of the hollow shaft and the shaft. Furthermore, a guide on the
• the sensor element has means for attachment to one end of the hollow axle of the pedal unit, so that the sensor element is separated from the transmitter in the hollow axle only via an air gap.
• this will be the
• the encoder is arranged on the shaft, which is inserted in the hollow axle, wherein the shaft is coupled to the pedal such that the encoder is moved by the pedal.
• a driver element can be used, which is for example pressed into the shaft and screwed to the pedal.
• a so-called drive plate can be used for this purpose.
• the drive plate is located on the same side or on the opposite side of the shaft on which the encoder is arranged.
• the encoder can be glued on the shaft, pressed or by a cohesive connection or non-positive Attached connection or positive connection.
• the encoder is thus arranged on the end face of the shaft opposite the sensor element only separated by the air gap.
• the encoder can be arranged in a recess of the shaft and, for example, only partially protrude beyond the shaft.
• the encapsulation of the air gap against the penetration of the foreign body can be achieved by the following measures:
• Sensor element including housing and pedal unit (bearing block).
• FIG. 2 shows a view of the pedal unit according to the invention
• FIG. 3 shows a view of the transducer device
• Figure 4 is a plan view of the sensor element
• FIG. 5 shows a flowchart of the method according to the invention.
• Figure 1 shows a sectional view through the pedal unit according to the invention with the essential relevant components according to the invention. From the Lübock 10 only the necessary parts that are necessary for understanding the invention are shown here. In the stage 10 is a
• the position bushing 11 is located.
• This bushing 11 is made for example of steel.
• the bearing of the shaft can be done at the protruding end of the hollow shaft and the outer diameter.
• the position block 10 is made of a usually magnetic material or material mix of magnetic and non-magnetic material.
• the shaft 12 according to the invention which is designed as a rotatable carrier, introduced and stored.
• the shaft 12 has on its front side a sensor magnet 15 as the encoder, which is present in the shaft 12, in a recess pressed. Present are However, other connection techniques for attaching the encoder magnet 15 on the front side of the shaft 12 possible.
• the magnet is made, for example, of plastic-bonded ferrite or sintered NeFeB or SmCo.
• the shaft 12 is prevented by a locking washer 13 from falling out of the
• Hollow axle protected Also conceivable is an introduction of the shaft in the hollow shaft, from the side on which the driver attacks until it stops at a collar of the shaft, so that the federal government and the driver in interaction secure the shaft from moving and falling out.
• the shaft 12 has a corresponding guide.
• a driver plate 14 is pressed into a corresponding opening 101 of the shaft 12.
• This opening 101 is dimensioned accordingly and is located on the opposite side of the end face of the shaft 12.
• the driver plate 14 as entrainment is fixedly connected to the pedal, for example by a screw or welded connection and resiliently designed for the purpose of tolerance compensation and axial positioning of the shaft to stop ,
• the sensor element 17 is applied by an air gap 102 relative to the encoder magnet 15 on the end of the hollow shaft and secured to the drive block 10, for example by a screw connection.
• the housing 19 is usually made of plastic by injection molding.
• the sensor element 17 has an IC or another electrical unit 16, which has the actual sensor for detecting the magnetic field and an evaluation chip. This electrical unit 16 is connected to a molded-on connector 18 or, alternatively, to a plug connected via cable outlet via connecting wires to which a cable can be plugged.
• FIG. 2 shows a further view of the pedal unit according to the invention.
• Pedal from the tread 25 and the arm 24 is about the hollow axis 23 in
• Position block 21 rotatably mounted and fixed.
• the encoder device according to the invention with the shaft, of which in the present case only the driver element 22 is shown, on the pedal arm 24th screwed or welded. Furthermore, you can see the sensor element 20 which is attached to the transmitter magnet.
• FIG 3 shows the encoder device according to the invention with the magnet 31, which sits on the shaft 30 and the driver plate 32, which is not shown here in full, but its part which is attached to the pedal arm, shown in Figure 2.
• FIG. 4 shows the sensor element according to the invention with the housing 40, the plug 41, the two arms 42 and 43, the bores 45 and 44
• FIG. 5 shows in a flow chart the method according to the invention for producing the pedal unit according to the invention.
• the movable bearing takes place about the hollow axis of the running block.
• the shaft with the transmitter magnet is introduced into the hollow axle.
• the inserted shaft is guided and stored, for example, in method step 502 and secured by a lock washer.
• the attachment of the driver element usually a
• Carrier plate on the pedal for example by a screw connection.
• the attachment of the sensor element takes place at the end of the hollow axle relative to the end face of the shaft on which the transmitter magnet is located. This attachment is achieved for example by a screw, clip or other suitable connection techniques.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Mechanical Control Devices (AREA)
• Transmission And Conversion Of Sensor Element Output (AREA)
• Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42562407

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (1)

Citations (8)

Family Cites Families (10)

• 2009
  • 2009-07-21 DE DE200910027864 patent/DE102009027864A1/de not_active Withdrawn
• 2010
  • 2010-06-08 JP JP2012520977A patent/JP2012533809A/ja active Pending
  • 2010-06-08 EP EP10722122.8A patent/EP2457134B1/de not_active Not-in-force
  • 2010-06-08 CN CN201080032961.0A patent/CN102473019B/zh not_active Expired - Fee Related
  • 2010-06-08 WO PCT/EP2010/057969 patent/WO2011009674A1/de not_active Ceased

Patent Citations (8)

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