Scheme for low power measurement

摘要

A method of determining a parameter includes providing a sensor that provides a sensor analog voltage. A peak detecting circuit for detecting a peak voltage in the sensor analog voltage is also provided. The sensor analog voltage is provided to the peak detecting circuit, and the peak voltage is detected. A microprocessor is provided in sleep mode and is awakened once the circuit detects the peak voltage. The microprocessor samples and records the peak voltage and the microprocessor goes back to sleep.

主权项

1. A method of determining a parameter, comprising:
a. providing a sensor that provides a sensor analog voltage; b. providing a peak detecting circuit for detecting a peak voltage in said sensor analog voltage, wherein said peak detecting circuit is an analog-to-digital circuit; c. providing said sensor analog voltage to said peak detecting circuit and detecting said peak voltage; d. providing a microprocessor in sleep mode; e. awakening said microprocessor once said circuit for detecting a peak voltage detects said peak voltage, sampling and recording said peak voltage, creating and storing a histogram of said peak voltage wherein said step of creating uses a rainflow analysis, and returning said microprocessor back to sleep.