Brake pad state estimation device and brake pad state estimation method

A brake pad state estimation device that estimates a brake pad state including at least one of a wear volume and a temperature of a brake pad of a vehicle,

• the brake pad state estimation device comprising:
• a brake pressure sensor that detects brake pressure of the vehicle;
• a wheel speed sensor that detects a vehicle speed of the vehicle;
• a processor;
• and
• a storage, wherein
• the processor is programmed to execute:
• an information acquisition process acquiring sensor detection information that includes the vehicle speed detected by the wheel speed sensor and the brake pressure detected by the brake pressure sensor;
• a brake pad state calculation process calculating the brake pad state based on the sensor detection information during braking of the vehicle;
• an information output process storing a result of calculation of the brake pad state in the storage and/or transmitting the result of calculation of the brake pad state to an outside of the vehicle;
• and
• processing frequency control that variably sets a processing frequency of at least one of the brake pad state calculation process and the information output process, and
• in the processing frequency control, the processor is further programmed to set the processing frequency in a case where the vehicle speed is lower to be lower than the processing frequency in a case where the vehicle speed is higher, or to set the processing frequency in a case where the brake pressure is lower to be lower than the processing frequency in a case where the brake pressure is higher.