Sensor device and lighting device

A sensor device, comprising:

• a radio wave sensor configured to transmit a radio wave and to receive a reflection wave which is the radio wave reflected off and returning from an object, and to output a sensor signal containing frequency components proportional to a movement speed of the object;
• a signal processor;
• and
• a non-transitory memory storing a program,
• wherein the program, when executed by the signal processor, causes the signal processor to perform:
• converting the sensor signal which is a first sensor signal of a time domain into a second sensor signal of a frequency domain;
• determining whether or not the object is a sensing target object based on a distribution of signal intensities showing magnitudes of frequency components of the second sensor signal;
• determining whether or not each of the frequency components of the second sensor signal is a noise component by comparing a signal intensity of at least one frequency component of the second sensor signal with a value calculated from the signal intensities of one or more vicinity frequency components of the second sensor signal, the one or more vicinity frequency components being located in a vicinity of the at least one frequency component;
• and
• removing, from the second sensor signal, one or more of the frequency components which is determined as the noise component.

A sensor device, comprising:

• a radio wave sensor configured to transmit a radio wave and to receive a reflection wave which is the radio wave reflected off and returning from an object, and to output a sensor signal containing frequency components proportional to a movement speed of the object;
• and
• a signal processor configured to:
• convert the sensor signal which is a first sensor signal of a time domain into a second sensor signal of a frequency domain;
• determine whether or not the object is a sensing target object based on a distribution of signal intensities showing magnitudes of frequency components of the second sensor signal;
• determine whether or not each of the frequency components of the second sensor signal is a noise component by comparing a signal intensity of at least one frequency component of the second sensor signal with a value calculated from the signal intensities of one or more vicinity frequency components of the second sensor signal, the one or more vicinity frequency components being located in a vicinity of the at least one frequency component;
• and
• remove, from the second sensor signal, one or more of the frequency components which is determined as the noise component.