Radar system in a motor vehicle
First Claim
1. A motor vehicle radar system, comprising:
- a structure including at least one of;
at least one sensor-radiation transparent body for focusing a sensor beam, and at least one radome without intentional focusing in a beam path; and
at least one arrangement including electrical printed circuit traces disposed in an area of at least one of the at least one sensor-radiation transparent body and the at least one radome, wherein;
the at least one arrangement heats at least one of the least one sensor-radiation transparent body and the at least one radome, an electrical power is supplied to the electrical printed circuit traces, and a power control of the supplied electrical power is carried out as a function of operating states and ambient conditions, such that a surface temperature of at least one of the at least one sensor-radiation transparent body and the at least one radome does not exceed a preestablished temperature value.
1 Assignment
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Accused Products
Abstract
A motor vehicle radar system having at least one sensor-radiation transparent body for focusing the sensor beam and/or at least one radome without intentional focusing in the beam path, at least one arrangement made of electrical printed circuit traces being arranged in the area of the sensor-radiation transparent body and/or the radome, the arrangement being suitable at least for heating the sensor-radiation transparent body and/or the radome, electrical power being able to be supplied to the electrical printed circuit traces, power control of the supplied electrical power being carried out as a function of operating states and ambient conditions, such that the surface temperature (TL) of the sensor-radiation transparent body and/or the radome does not exceed preestablished temperature values.
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Citations
24 Claims
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1. A motor vehicle radar system, comprising:
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a structure including at least one of;
at least one sensor-radiation transparent body for focusing a sensor beam, and at least one radome without intentional focusing in a beam path; and
at least one arrangement including electrical printed circuit traces disposed in an area of at least one of the at least one sensor-radiation transparent body and the at least one radome, wherein;
the at least one arrangement heats at least one of the least one sensor-radiation transparent body and the at least one radome, an electrical power is supplied to the electrical printed circuit traces, and a power control of the supplied electrical power is carried out as a function of operating states and ambient conditions, such that a surface temperature of at least one of the at least one sensor-radiation transparent body and the at least one radome does not exceed a preestablished temperature value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
the power control is exercised as a result of a voltage that drops off at the electrical printed circuit traces and that is not constant over time.
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4. The motor vehicle radar system according to claim 3, wherein:
the voltage is a fundamental voltage that is clocked at a preestablished pulse-duty factor via a switch.
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5. The motor vehicle radar system according to claim 4, wherein:
the fundamental voltage is the operating voltage of the vehicle electrical system.
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6. The motor vehicle radar system according to claim 5, wherein:
the at least one arrangement is dimensioned such that an electrical resistance of the electrical printed circuit traces is so small that at a long-lasting pulse-duty factor of t/T=1, a multiple of an actually permitted heating power results.
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7. The motor vehicle radar system according to claim 4, further comprising:
- a control unit for determining the pulse-duty factor.
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8. The motor vehicle radar system according to claim 7, wherein:
the control unit includes a memory for storing an input-output map.
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9. The motor vehicle radar system according to claim 7, further comprising:
an analog-digital converter integrated with the control unit and for measuring an operating voltage of a vehicle electrical system.
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10. The motor vehicle radar system according to claim 3, wherein:
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the voltage is a function of at least one of a set of quantities including;
an operating voltage of a vehicle electrical system, an ambient temperature outside a motor vehicle, a speed of the motor vehicle, the surface temperature of at least one of the at least one sensor-radiation transparent body and the at least one radome.
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11. The motor vehicle radar system according to claim 10, wherein:
at least one of the set of quantities is made available to a bus system within the motor vehicle.
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12. The motor vehicle radar system according to claim 1, wherein:
the at least one arrangement includes a ferromagnetic material.
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13. A motor vehicle radar system, comprising:
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a structure including at least one of;
at least one sensor-radiation transparent body for focusing a sensor beam, and at least one radome without intentional focusing in a beam path; and
at least one arrangement including a conducting path disposed in an area of at least one of the at least one sensor-radiation transparent body and the at least one radome, wherein;
the at least one arrangement heats at least one of the least one sensor-radiation transparent body and the at least one radome, an electrical power is supplied to the conducting path, and a power control of the supplied electrical power is carried out as a function of operating states and ambient conditions, such that a surface temperature of at least one of the at least one sensor-radiation transparent body and the at least one radome does not exceed a preestablished temperature value. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
the at least one sensor radiation-transparent body includes a dielectric lens.
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15. The motor vehicle radar system according to claim 13, wherein:
the power control is exercised as a result of a voltage that drops off at the conducting path and that it not constant over time.
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16. The motor vehicle radar system according to claim 15, wherein:
the voltage is a fundamental voltage that is clocked at a preestablished pulse-duty factor via a switch.
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17. The motor vehicle radar system according to claim 16, wherein:
the fundamental voltage is the operating voltage of the vehicle electrical system.
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18. The motor vehicle radar system according to claim 17, wherein:
the at least one arrangement is dimensioned such that an electrical resistance of the conducting path is so small that a long-lasting pulse-duty factor of t/T=1, a multiple of an actually permitted heating power results.
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19. The motor vehicle radar system according to claim 16, further comprising:
a control unit for determining the pulse-duty factor.
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20. The motor vehicle radar system according to claim 19, wherein:
the control unit includes a memory for storing an input-output map.
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21. The motor vehicle radar system according to claim 19, further comprising:
an analog-digital converter integrated with the control unit and for measuring an operating voltage of a vehicle electrical system.
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22. The motor vehicle radar system according to claim 15, wherein:
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the voltage is a function of at least one of a set of quantities including;
an operating voltage of a vehicle electrical system, an ambient temperature outside a motor vehicle, a speed of the motor vehicle, the surface temperature of at least one of the at least one sensor-radiation transparent body and the at least one radome.
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23. The motor vehicle radar system according to claims 22, wherein:
at least one of the set of quantities is made available to a bus system within the motor vehicle.
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24. The motor vehicle radar system according to claim 13, wherein:
the at least one arrangement includes a ferromagnetic material.
Specification