Ultrasonic transducer prefixed amplifying circuit for monitoring wind speed of wind power plant

• Main Authors: DING KUN, LU LIANG, LI JIN, HE SHIEN, WANG NINGBO, ZHOU ZHIYUAN
• Format: Patent
• Language: Chinese; English
• Published: 25.06.2014
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

The invention discloses an ultrasonic transducer prefixed amplifying circuit for monitoring wind speed of a wind power plant. The ultrasonic transducer prefixed amplifying circuit comprises an operational amplifier U11A, an operational amplifier U11B, a diode D111, a diode D112, a capacitor C117, a resistor R111, a resistor R112, a resistor 113, a resistor R114, a resistor R115, a resistor R116 and a resistor R118. The prefixed amplifying circuit is composed of the operational amplifiers and an RC (resistor and capacitor) network in a cascading manner, the first stage adopts an opposition amplifying circuit, and voltage gain is 10 times. For protecting the pre-amplifying circuit during emitting, the input ends of the operation amplifiers are connected two back-to-back diodes, and the optional amplifiers are protected from damage. The second stage of the operational amplifiers amplifies in the same phase, the capacitor C117 and the resistor R118 form an RC high-pass circuit, and direct-current bias and low-fre