The invention discloses an
infrared axle temperature detection
system modulation type probe
infrared radiation modulation device comprising a modulation driving board, a brushless
DC motor and a
radiation modulation disc. The modulation driving board comprises a power supply module, a control module, a power inversion module, a
circuit protection module, a position
signal processing module and a modulation
signal processing module. When a wheel sensor in the
train coming direction of the rail side detects passing of a
train, the wheel sensor transmits a
train passing
signal to a control
machine, and the control
machine detects the signal and then transmits a modulation signal to an
infrared probe. The modulation driving board receives the modulation signal and then drives the brushless
DC motor to stably operate at the designated rotating speed in a high-speed way so as to drive the
radiation modulation disc to rotate at the designated speed to modulate axle temperature infrared radiation of the train into
radiation flux of which the amplitude continuously changes along with time. Advantages of the infrared axle temperature detection
system modulation type probe infrared radiation modulation device are that the device is based on the principle of digital
pulse width modulation and is high in precision, high in regulation speed, high in anti-
noise performance, low in cost, low in
power consumption, flexible to control and great in dynamic response.