Patent ID: 8703495

Claim:
A blood coagulation detection device, comprising: a micro channel unit having a sample detection area; an optical signal unit for transmitting a reference light to the micro channel unit so as to form a message light; an opto-electronic conversion circuit for receiving the message light and converting the message light into an electrical signal; an amplifier circuit electrically connected to the opto-electronic conversion circuit for amplifying the electrical signal; and a filter circuit electrically connected to the amplifier circuit for filtering the amplified electrical signal; wherein the optical signal unit measures the blood coagulation by transmitting the reference light to the micro channel unit; the filter circuit comprises a first filter circuit electrically connected to the amplifier circuit, and a second filter circuit electrically connected to the first filter circuit; the first filter circuit is a notch filter; and the central frequency of the notch filter is set to be 60 Hz.