The electric shoot device of slow-shooter-gun consists of the detection circuit equipped with infrared emitter and silicon-photoelectric cell, PIC12F675 MCU with 8 pins, conversion circuits of input, driver, DC/ DC etc.
The new high-side current sensor AD8205 can simplify the detection circuit. The adjustable current source using AD8205 and current PWM controller UC3842 features such advantages as simplified reliable circuits and high precision output current.
Take UGN-3501M chip and integrated AD 522 double-end diflerential input measuring amplifilter as dominant to design DC current detecting circuit. The circuit has fine linearity(absolute linearity being 8.2%)and high precision(maximnm relative error being 1.4%).
The main work and research results of the thesis includes the following:1. This thesis detailedly discusses the exploitation of MCU application system based on 80C196KC, the designing method and application of each function module, such as A/D converter, D/A converter, communication module, keyboard module, power module, displaying module, I/O expanding circuit, detecting circuit and charging circuit, and so on.
The paper discussed high-precision measurement detection method of period,time and phase differences of AC signal,gave the flow sheet of signal detecting circuit connection circuits for EPP and Counter 8254 and main programme.
The design of the hardware and software of SRM drive system are introduced, including the TMS320LF240 based control circuit, the power drive circuit, the detecting circuit and the control software at the same.
The terminal voltage of the control coil is detected by the test circuit. Then the signal containing the information of rotor displacement is obtained ,from which we can get the DC voltage signal proportional to the rotor displacement through half-wave rectification circuit and low pass circuit. This DC signal is put into a PID controller to get the control signal of the rotor displacement.
On the basis of study on the burning characteristics of oxygen-poor fuel-rich propellant, such as frequency band and unsta-bility of burning acoustic signal, adopting the weak-signal testing circuit and computer, a new acoustic emission instrument for measuring burning rate of oxygen-poor fuel-rich propellant was developed.
The system is based on TMS320LF240 as the main controlling unit. The structure and principles of the control system are introduced in detail,including the motor drive circuit, current and voltage testing circuit,and the position/speed testing circuit.
The influence of background light and load resistance on APD detection circuit is analyzed in detail.
The measured results of the test chip fabricated with the 1.2$mUm complementary metal-oxide-semiconductor (CMOS) process showed that the edge detection circuit inserted to the first stage of the proposed network can detect the edge position.
The proposed unit circuit was constructed using a previously proposed edge detection circuit and a novel proposed circuit for generating a motion signal which accepts an edge signal.
Following a brief introduction of clock and data recovery circuit, a phase detection circuit, one of the most critical blocks in a CDR that determines not only the performance but also the CDR architecture, is addressed.
The optical circuits and signal detection circuit are presented.