Systems and methods for updating software in a hazard detection system
摘要
說明書
The bifurcated processor arrangement may further enable hazard detection system 400 to minimize power consumption by enabling the relatively high power consuming system processor 402 to transition between sleep and non-sleep states while the relatively low power consuming safety processor 430 is maintained in a non-sleep state. To save power, system processor 402 can be kept in the sleep state until one of any number of suitable events occurs that wakes up system processor 402. Sleep/wake module 414 can control the sleep and non-sleep states of system processor 402. Safety processor 430 can instruct sleep/wake module 414 to wake system processor 402 in response to a trigger event (e.g., as detected by trigger module 436) or a state change in sensor state machines 432. Trigger events can occur when a data value associated with a sensor moves out of a trigger band associated with that sensor. A trigger band can define upper and lower boundaries of data values for each sensor and are stored with safety processor 430 in trigger module 436. Trigger module 436 can monitor sensor data values and compare them against the boundaries set for that particular sensor's trigger band. Thus, when a sensor data value moves out of band, trigger module 436 registers this as a trigger event and notifies system processor 402 of the trigger event (e.g., by sending a signal to sleep/wake module 414).
