Motor overheating verbal alarm circuit

The circuit is shown in the figure. It consists of a temperature sensor, an electronic switch circuit and a language sound circuit. When a motor malfunctions during high-temperature seasons or when running at room temperature, the motor often overheats. This circuit can emit a warning language of "beep, please pay attention" when the temperature of the motor casing is too high to remind the personnel on duty to pay attention to avoid burning the motor.