CPC G01L 5/221 (2013.01) [B62D 6/10 (2013.01); G01D 5/145 (2013.01); H04W 4/38 (2018.02)] | 21 Claims |
1. A rotation sensor system, comprising:
a rotational shaft configured to rotate about a rotational axis;
a first array of millimeter-wave (mm-wave) structures mechanically coupled to the rotational shaft, wherein the first array of mm-wave structures is arranged at least partially around the rotational axis, and wherein the first array of mm-wave structures has a first working resonance frequency;
a second array of mm-wave structures mechanically coupled to the rotational shaft, wherein the second array of mm-wave structures is arranged at least partially around the rotational axis, and wherein the second array of mm-wave structures has a second working resonance frequency that is different from the first working resonance frequency;
at least one transmitter configured to transmit a first electro-magnetic transmit signal towards the first array of mm-wave structures and transmit a second electro-magnetic transmit signal towards the second array of mm-wave structures,
wherein the first array of mm-wave structures is configured to convert the first electro-magnetic transmit signal into a first electro-magnetic receive signal, and
wherein the second array of mm-wave structures is configured to convert the second electro-magnetic transmit signal into a second electro-magnetic receive signal; and
at least one receiver configured to receive the first electro-magnetic receive signal and the second electro-magnetic receive signal, determine a first rotational parameter of the rotational shaft based on the first electro-magnetic receive signal, and determine a second rotational parameter of the rotational shaft based on the second electro-magnetic receive signal, wherein the first rotational parameter and the second rotational parameter are different rotational parameters.
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