While a well-known use of this is sonar, ultrasonic sensors can also be put to use to make a radar-like system. This ultrasonic radar project is from [mircemk] who uses a small ultrasonic distance ...

God's Eye C (DiPilot 100) is the entry-level version, utilizing 12 cameras and 12 ultrasonic radar sensors ... to the market ...

The EV sedan looks similar to the prototype ... now improved with visible sensor bumps for the 40 cameras, lidar, radar, and ultrasonic sensors supporting its advanced driver-assist system.