Devices for measuring voltage of a power supply, detection devices, and temperature controllers

摘要

Disclosed are exemplary embodiments of devices for measuring voltage of a power supply. Also disclosed are exemplary embodiments of detection devices and temperature controllers comprising such devices for measuring voltage of a power supply. In exemplary embodiments, a device for measuring the voltage of a power supply generally includes a resistor, a capacitor, and a control unit. One end of the capacitor is connected with the resistor, while the other end of the capacitor is connected to ground. The control unit is connected with the power supply. The control unit includes a comparator connected with the capacitor, a reference power supply connected with the comparator, a timer, and a computing unit.

主权项

1. A device for measuring voltage of a power supply, the device comprising:
a resistor; a capacitor having one end connected with the resistor and another end connected to ground; and a control unit connected with the power supply, the control unit including a comparator connected with the capacitor, a reference power supply connected with the comparator, a timer, and a computing unit; wherein the reference power supply includes an absolute reference power supply and a relative reference power supply; wherein the control unit is operable for controlling the comparator to connect to the absolute reference power supply or the relative reference power supply, such that:
when the control unit controls the comparator to connect to the relative reference power supply, the timer is operable for measuring a first time interval between the time when the voltage of the capacitor begins to discharge after being fully charged and the time when the voltage across the capacitor is equal to the voltage of the relative reference power supply; orwhen the control unit controls the comparator to connect to the absolute reference power supply, the timer is operable for measuring a second time interval between the time when the voltage of the capacitor begins to discharge after being fully charged and the time when the voltage across the capacitor is equal to the voltage of the absolute reference power supply; wherein the computing unit is operable for calculating the voltage of the power supply based on the first time interval, the second time interval, and the voltage of the absolute reference power supply.