TIRE DETERIORATION DETECTION SYSTEM, TIRE WEAR DETECTION SYSTEM AND TIRE WEAR DETECTION METHOD

A tire deterioration detection system, a tire wear detection system and a tire wear detection method can suppress influences caused by curving of a vehicle. The tire deterioration detection system (1) estimates deterioration state, for example, wear state of each tire (3) of a vehicle (2). A calculation part (23) derives a moving length of each tire in view of an effect caused by curving based on a traveling path of the vehicle obtained from position data by a GPS receiver (22) and an outer diameter of the tire (3) from the moving length of the tire (3), so that calculation part (23) derives a wear loss of the tire (3) and estimate the wear state of the tire (3) from the wear loss of the tire (3). 本发明提供一种能够抑制车辆的转弯产生的影响的轮胎劣化检测系统、轮胎磨损检测系统、及轮胎磨损检测方法。轮胎劣化检测系统(1)为推定车辆(2)的各轮胎(3)的劣化状态，例如磨损状态的装置。运算部(23)基于从GPS接收机(22)接收的位置数据得到的车辆的行驶路径，导出还考虑转弯的影响的各轮胎(3)的移动长度，从各轮胎(3)的移动长度导出各轮胎(3)的外径，导出各轮胎3的磨损量，根据各轮胎(3)的磨损量推定各轮胎(3)的磨损状态。