Surroundings monitoring apparatus and program product

A surroundings monitoring apparatus for recognizing, based on detection information acquired from a radio-wave transceiver, a rearward side object located behind and to a right or left side of an own vehicle, the radio-wave transceiver having a detection range located behind and to the right or left side of the own vehicle, the surroundings monitoring apparatus comprising:

• a first determiner configured to determine whether an object is located at least in front of or on a right or left side of the own vehicle;
• a second determiner configured to determine whether a towed vehicle is located behind the own vehicle, the towed vehicle being coupled with the own vehicle, the towed vehicle having a front end and a rear end;
• a third determiner configured to, in response to determination that (i) the object is located at least in front of or on the right or left side of the own vehicle and (ii) the towed vehicle is located behind the own vehicle, determine, based on a positional relationship between the object determined by the first determiner and the towed vehicle determined by the second determiner, whether the rearward side object is a ghost due to the object determined by the first determiner and the towed vehicle determined by the second determiner;
• and
• a hard-to-detect area establishing unit configured to establish a hard-to-detect area defined as an area in which detection by the radar-wave transceiver is hard, wherein:
• the third determiner is configured to cause the rearward side object to be more likely to be determined as a ghost in a first case where the rearward side object is located in the hard-to-detect area as compared with a second case where the rearward side object is located outside the hard-to-detect area.

A processor program product including:

• a non-transitory storage medium readable by a processor for recognizing, based on detection information acquired from a radio-wave transceiver, a rearward side object located behind and to a right or left side of an own vehicle, the radio-wave transceiver having a detection range located behind and to the right or left side of the own vehicle;
• and
• control program instructions stored in the non-transitory storage medium,
• the control program instructions cause the processor to:
• perform a first determination step of determining whether an object is located at least in front of or on a right or left side of the own vehicle;
• perform a second determination step of determining whether a towed vehicle is located behind the own vehicle, the towed vehicle being coupled with the own vehicle, the towed vehicle having a front end and a rear end;
• determine, in response to determination that (i) the object is located at least in front of or on the right or left side of the own vehicle and (ii) the towed vehicle is located behind the own vehicle, whether the rearward side object is a ghost due to the object determined by the first determination step and the towed vehicle determined by the second determination step based on a positional relationship between the object determined by the first determination step and the towed vehicle determined by the second determination step;
• and
• establish an object searching area located at least in front of or on the right or left side of the own vehicle in accordance with:
• (i) a position of the radio-wave transceiver;
• (ii) at least one of a position of each of left and right edges of the front end of the towed vehicle and a position of each of left and right edges of the rear end of the towed vehicle;
• and
• (iii) an angle of the towed vehicle tilted to a traveling direction of the own vehicle, wherein
• the first determination step is configured to determine whether an object is located in the established searching area.

A processor program product including:

• a non-transitory storage medium readable by a processor for recognizing, based on detection information acquired from a radio-wave transceiver, a rearward side object located behind and to a right or left side of an own vehicle, the radio-wave transceiver having a detection range located behind and to the right or left side of the own vehicle;
• and
• control program instructions stored in the non-transitory storage medium,
• the control program instructions cause the processor to:
• perform a first determination step of determining whether an object is located at least in front of or on a right or left side of the own vehicle;
• perform a second determination step of determining whether a towed vehicle is located behind the own vehicle, the towed vehicle being coupled with the own vehicle, the towed vehicle having a front end and a rear end;
• perform a third determination step of determining, in response to determination that (i) the object is located at least in front of or on the right or left side of the own vehicle and (ii) the towed vehicle is located behind the own vehicle, whether the rearward side object is a ghost due to the object determined by the first determination step and the towed vehicle determined by the second determination step based on a positional relationship between the object determined by the first determination step and the towed vehicle determined by the second determination step;
• and
• establish a hard-to-detect area defined as an area in which detection by the radar-wave transceiver is hard, wherein:
• the third determination step is configured to cause the rearward side object to be more likely to be determined as a ghost in a first case where the rearward side object is located in the hard-to-detect area as compared with a second case where the rearward side object is located outside the hard-to-detect area.

A surroundings monitoring method of recognizing, based on detection information acquired from a radio-wave transceiver, a rearward side object located behind and to a right or left side of an own vehicle, the radio-wave transceiver having a detection range located behind and to the right or left side of the own vehicle, the surroundings monitoring method comprising:

• performing a first determination step of determining whether an object is located at least in front of or on a right or left side of the own vehicle;
• performing a second determination step of determining whether a towed vehicle is located behind the own vehicle, the towed vehicle being coupled with the own vehicle, the towed vehicle having a front end and a rear end;
• performing a third determination step of determining, in response to determination that (i) the object is located at least in front of or on the right or left side of the own vehicle and (ii) the towed vehicle is located behind the own vehicle, whether the rearward side object is a ghost due to the object determined by the first determination step and the towed vehicle determined by the second determination step based on a positional relationship between the object determined by the first determination step and the towed vehicle determined by the second determination step;
• and
• establishing an object searching area located at least in front of or on the right or left side of the own vehicle in accordance with:
• (i) a position of the radio-wave transceiver;
• (ii) at least one of a position of each of left and right edges of the front end of the towed vehicle and a position of each of left and right edges of the rear end of the towed vehicle;
• and
• (iii) an angle of the towed vehicle tilted to a traveling direction of the own vehicle, wherein:
• the first determination step determines whether an object is located in the searching area established by the searching area establishing unit.

A surroundings monitoring method of recognizing, based on detection information acquired from a radio-wave transceiver, a rearward side object located behind and to a right or left side of an own vehicle, the radio-wave transceiver having a detection range located behind and to the right or left side of the own vehicle, the surroundings monitoring method comprising:

• performing a first determination step of determining whether an object is located at least in front of or on a right or left side of the own vehicle;
• performing a second determination step of determining whether a towed vehicle is located behind the own vehicle, the towed vehicle being coupled with the own vehicle, the towed vehicle having a front end and a rear end;
• performing a third determination step of determining, in response to determination that (i) the object is located at least in front of or on the right or left side of the own vehicle and (ii) the towed vehicle is located behind the own vehicle, whether the rearward side object is a ghost due to the object determined by the first determination step and the towed vehicle determined by the second determination step based on a positional relationship between the object determined by the first determination step and the towed vehicle determined by the second determination step;
• and
• establishing a hard-to-detect area defined as an area in which detection by the radar-wave transceiver is hard, wherein:
• the third determination step causes the rearward side object to be more likely to be determined as a ghost in a first case where the rearward side object is located in the hard-to-detect area as compared with a second case where the rearward side object is located outside the hard-to-detect area.