liquid height model and transducer control model, volumetric efficiency model and speed of rotor of PCP are constructed according to the rotational speed relation of frequency converter, motor, reducer, PCP.
The signal is acquired by sounding lead and flowmeter and is transferred to programmable logic control. Frequency of the transducer is changed by PLC according to the control model, consequently, speed of electromotor and rotor of PCP is changed.
This article mainly introduces the fundamental principles and structure of the meter,the working Process of the transducer,the composition and action of the display and the main technical index of the meter.
The paper deals in detail with the design conception and working principle of intelligent static pressure oilcan measuring system, using 89C51 as its core and NT 872 liquid -level transducer as signal collecting component. The system is characteristic of simple structure, new design, multiple functions, convenient operation, wide oil products temperature measuring range and so on. Some intelligent methods were adopted, which guaranteed the measuring accuracy of oil products parameters within the wide range.
The conditioning force was monitored by a force transducer, while the modified wheel surface status was in-situ monitored by a coaxial optical distance measurement system.
Design of a piezoelectric transducer cylindrical phase modulator for simulating acoustic emission signals
To conveniently carry out the pipeline leak experiment in a laboratory, leak acoustic signals are simulated by using the converse piezoelectric effect of a piezoelectric transducer (PZT) cylindrical phase modulator.
Ultrasonic linear motor using the L-B mode Langevin transducer with an exponential horn
An ultrasonic linear motor is proposed and fabricated by using the longitudinal and bending vibration double mode bolt-clamped Langevin type transducer to meet high power and speed requirements in the aerospace and semiconductor industries.