Aspects presented herein may enable a wireless device to dynamically change the frequencies of its pilot tones based on the distance of one or more objects detected, thereby enabling the wireless device to utilize the advantages of both high frequency pilot tone and low frequency pilot tone. In one aspect, a wireless device transmits a first pilot tone at a first frequency. The wireless device detects whether there is an object within a specified distance of the wireless device based on a reflected signal of the first pilot tone. The wireless device transmits a second pilot tone at a second frequency based on at least one object being detected within the specified distance, where the second frequency is higher than the first frequency. The wireless device calculates a first distance of the at least one object with respect to the wireless device based the second pilot tone.

One embodiment provides a method comprising acquiring, via one or more microphones of a device in a spatial area, a signal representing at least one echo of an ultrasound emitted via one or more loudspeakers of the device. The method further comprises applying digital signal processing to the signal to determine a signal-to-noise ratio (SNR) of the signal, and estimating one or more properties of a moving reflector in the spatial area based on the SNR of the signal.

A vehicle flow monitoring system for detecting both a car count and direction of movement of vehicles passing a point of interest. The vehicle flow monitoring system generally includes a car counter which may include a microcontroller and a pair of distance sensors. Each of the distance sensors is oriented toward a unique point of interest. Each of the distance sensors includes a threshold distance reading which is used to detect whether a vehicle has passed underneath the car counter. The system may determine direction of travel of the vehicle based on which of the distance sensors is passed by the vehicle first.

The microcontroller may assign an Event ID to each time a vehicle passes each of the sensors, with the Event ID being used to identify when and if the vehicle should be counted, or whether a non-vehicle object has passed the car counter.

An ultrasonic detection device has an ultrasonic probe, which transmits ultrasonic waves and receives echoes; a reflector, arranged spaced apart from the ultrasonic probe, which redistributes the energy of the ultrasonic wave to change the detection range of the ultrasonic wave. The ultrasonic detection method changes from original direct type to a horizontal type, optimizes the ultrasonic detection range to adapt to the actual detection space, and improves the accuracy of the detection.

An ultrasonic detection device has an ultrasonic probe, which transmits ultrasonic waves and receives echoes; a reflector, arranged spaced apart from the ultrasonic probe, which redistributes the energy of the ultrasonic wave to change the detection range of the ultrasonic wave. The ultrasonic detection method changes from original direct type to a horizontal type, optimizes the ultrasonic detection range to adapt to the actual detection space, and improves the accuracy of the detection.

The present disclosure provides systems and methods for using compressed sensing for imaging an object for use in combination with an entertainment or infotainment device. For example, the system may utilize a few(e.g., 1, 2, 3 . . . ) pixel imaging sensor to obtain coarse image data from each of a plurality of subregions of a region of interest. Compressed sensing techniques may then be used to estimate a higher resolution image of the region of interest using the coarse image data from the plurality of subregions.

The present disclosure provides systems and methods for using compressed sensing for imaging an object for use in combination with an entertainment or infotainment device. For example, the system may utilize a few(e.g., 1, 2, 3 . . . ) pixel imaging sensor to obtain coarse image data from each of a plurality of subregions of a region of interest. Compressed sensing techniques may then be used to estimate a higher resolution image of the region of interest using the coarse image data from the plurality of subregions.

A system for controlling a subject vehicle includes a front detection unit to detect a driving situation of a target vehicle located in front of the subject vehicle; a determination unit to detect reversing of the target vehicle or predict a collision between the target vehicle and the subject vehicle through the front detection unit; and a control unit to, when the reversing of the target vehicle is detected or the collision between target vehicle and the subject vehicle is predicted through the determination unit, generate a warning signal of the subject vehicle or control driving of the subject vehicle so that the subject vehicle avoids the collision with the target vehicle.

A system for controlling a subject vehicle includes a front detection unit to detect a driving situation of a target vehicle located in front of the subject vehicle; a determination unit to detect reversing of the target vehicle or predict a collision between the target vehicle and the subject vehicle through the front detection unit; and a control unit to, when the reversing of the target vehicle is detected or the collision between target vehicle and the subject vehicle is predicted through the determination unit, generate a warning signal of the subject vehicle or control driving of the subject vehicle so that the subject vehicle avoids the collision with the target vehicle.

An obstacle monitoring system includes a first transducer that obtains a first distance measurement to an obstacle using a first linear frequency modulated (LFM) chirp. The system further includes a second transducer, able to operate concurrently with the first transducer, that obtains a second distance measurement to the obstacle using a second LFM chirp. The second LFM chirp has an inverted slope or shifted center frequency compared to the first LFM chirp. The system further includes a controller that processes the first and second distance measurements to determine a motion-compensated distance measurement to the obstacle.