Hostless radar ranging alarm method and device, circuit and storage medium

The invention discloses a hostless radar ranging alarm method and device, a circuit and a storage medium. The method comprises the following steps: starting the radar of a target automobile when the target automobile is detected to enter a reversing mode; acquiring voltage values of a plurality of radar probes of the radar, and distributing different radar probe IDs according to the voltage values; sending a self-checking result to a vehicle-mounted instrument to enable the vehicle-mounted instrument to analyze the self-checking result and feed back an analysis result; and if the analysis result shows that self-checking is qualified, receiving obstacle distance information fed back by each radar probe, and sending the obstacle distance information to the vehicle-mounted instrument to enable the vehicle-mounted instrument to judge whether alarm information is generated to give an alarm or not after comparing the obstacle distance information with a preset alarm distance threshold. The cost of the radar device