WHEEL SPEED SENSOR WITH SUPPORT FOR INDIRECT TIRE PRESSURE MONITORING
First Claim
1. An indirect tire pressure monitoring system (TPMS), comprising:
- a magnetic field sensor configured to detect a modulated magnetic field indicative of one or more resonance parameters of an automobile tire and to generate a modulated sensor signal based upon the modulated magnetic field;
an analog-to-digital converter (ADC) configured to convert the modulated sensor signal to a digital sensor signal;
a digital signal processing unit configured to receive the digital sensor signal and to perform analysis of the digital sensor signal to determine the one or more resonance parameters; and
a communication interface configured to transmit data corresponding to the one or more resonance parameters to an electronic control unit (ECU).
1 Assignment
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Accused Products
Abstract
The present disclosure relate to an indirect tire pressure monitoring system (TPMS). In some embodiments, the indirect TPMS has magnetic field sensor that detects a modulated magnetic field indicative of one or more resonance parameters of an automobile tire. The magnetic field sensor generates a modulated sensor signal based upon the modulated magnetic field. An analog-to-digital converter (ADC) converts the modulated sensor signal to a digital sensor signal, which is provided to a digital signal processing unit that perform analysis of the digital sensor signal to determine the one or more resonance parameters. A communication interface transmit data corresponding to the one or more resonance parameters to an electronic control unit (ECU).
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Citations
24 Claims
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1. An indirect tire pressure monitoring system (TPMS), comprising:
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a magnetic field sensor configured to detect a modulated magnetic field indicative of one or more resonance parameters of an automobile tire and to generate a modulated sensor signal based upon the modulated magnetic field; an analog-to-digital converter (ADC) configured to convert the modulated sensor signal to a digital sensor signal; a digital signal processing unit configured to receive the digital sensor signal and to perform analysis of the digital sensor signal to determine the one or more resonance parameters; and a communication interface configured to transmit data corresponding to the one or more resonance parameters to an electronic control unit (ECU). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An indirect tire pressure monitoring system (TPMS), comprising:
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a magnetic field sensor configured to generate a modulated sensor signal corresponding to a measured magnetic field indicative of one or more resonance parameters of an automobile tire; and an analog-to-digital converter (ADC) configured to sample the modulated sensor signal and to provide a digital signal, based upon the samples, to a demodulation element configured generate a demodulated signal having a lower frequency than the modulated sensor signal; a spectral analysis element configured to receive the demodulated sensor signal and to perform analysis of the sensor signal to determine the one or more resonance parameters; and a communication interface configured to transmit data corresponding to the one or more resonance parameters to an electronic control unit (ECU). - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of measuring a tire pressure, comprising:
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receiving a modulated sensor signal from a magnetic field sensor configured to detect a modulated magnetic field indicative of a wheel speed and one or more resonance frequencies of an automobile tire; converting the modulated sensor signal to a digital sensor signal; performing analysis of the digital sensor signal to determine the one or more resonance parameters; and transmitting data corresponding to the one or more resonance parameters to an electronic control unit (ECU). - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification