COOLING AND HEATING METHOD OF SENSOR

摘要

PURPOSE: A cooling and heating method for a sensor is provided to rapidly preheat laser diode in extreme situations and function as cooling and preheating laser diode by using a nickel chrome heating wire device and a Peltier module. CONSTITUTION: A cooling and heating method for a sensor comprises the following steps: receiving temperature data values from one or more temperature sensors using a control unit; comparing the temperature data values with a predetermined reference value using the control unit; heating or cooling a sensor by implementing one or more modes among a heating wire device operation mode, an thermoelement operation mode, and a cooling fan operation mode according to the comparison result using the control unit. [Reference numerals] (AA) Heating wire device operation mode; (BB) Cooling fan operation mode; (CC) (cooling mode); (DD) (heating mode); (EE) Thermoelement operation mode; (S25) ΔT > threshold (20°C); (S27) High speed mode; (S33) High speed cooling fan mode; (S37) Low speed cooling fan mode; (S43) Polarity switching; (S47) Current state maintaining mode; (S51) ΔT2 = PTemp - LDTemp (gain calculation); (S53) PWM signal output