Design And Research Of A Multi-parameter Measurement And Control Device

In test trials pose an aircraft to take off, the reasonable control gas solenoid valve and a pyrotechnic ignition assembly and test process produces along with various parameters of the signal acquisition and processing analysis is critical to the successful launch of spacecraft can link. From the function and parameter index indicator data collection and analysis system for automatic processing of starting the design and research of a multi-parameter measuring and control device. A multi-parameter measuring and control device to complete the main gas solenoid valve control, the implementation of test pyrotechnic ignition assembly and testing process temperature, pressure, thrust, and other parameters, and other functions.The modular design ideas and methods described herein in accordance with the top-on, hardware circuitry and logic key part of the terms of two aspects of the design and research of Expand control. It introduces the present situation of the development of data acquisition and automated test systems, detailed analysis of the technical and functional needs of multi-parameter measurement and control devices, and then given for the overall design of the technical specifications and functional requirements. In terms of hardware circuit, equivalent model for the establishment of a solenoid valve device to work, study and design of the hardware circuit and control measures designed to protect the solenoid valve inductive devices; according to the sampling Technical indicators multi-parameter signal for precision thermocouple temperature signals problems using cold junction compensation and discusses the different linear fitting parameters affect the accuracy of the study design and the pre-multi-parameter signal conditioning circuits, and finally a brief introduction of the pyrotechnic ignition assembly modules, data transmission link design. Logic control, discussed in detail based on FPGA logic implementation of the solenoid valve can be configured to pulse; from the analog and digital conversion of significant digits and SNR point of view, discussed in detail and over-designed based on FPGA digital sampling smoothing filtering.Finally, multi-parameter measurement and control devices and functions of the unit test application environment indicators prove that multi-parameter measuring and control device to meet the design requirements, high reliability, safety, and environmental compatibility.