A transmitter is configured to be attached to each of wheel assemblies provided in a vehicle and execute a process in accordance with a command included in a trigger signal. The transmitter includes a battery, which serves as a power source for the transmitter, a condition detecting section, which is configured to detect a condition of a tire, a trigger receiving section, which is configured to receive, as the trigger signal, an unmodulated wave having a received signal strength indication greater than or equal to a predetermined received signal strength indication, a transmitting section, which is configured to transmit a signal, and a controlling section, which is configured such that, when the trigger receiving section receives the unmodulated wave, the controlling section causes the transmitting section to transmit the signal in response to the unmodulated wave. The controlling section is configured to execute an accumulation process to accumulate reception time of the unmodulated wave from a starting point in time, and shift into a restriction state to restrict a response to the unmodulated wave when the accumulated reception time reaches a predetermined time.
TRANSMITTER
2022-09-29
Patent
Elektronische Ressource
Englisch