Research On Backup Power Test System Based On DSP And LabVIEW

With the development of networking and information technology,the backup power supply is in an increasingly important position in the whole system.An efficient and stable backup power supply is a prerequisite for ensuring the normal operation of the whole system,and for the backup type.Real-time monitoring of the power supply is the most effective way to ensure reliable system operation.This article will use LabVIEW graphical programming language and NXP HCS12 16-bit microprocessor to design an online electrical function test system for the widely used backup power supply(UPS),and combine hardware and software through Modbus bus.It realizes the monitoring and real-time query of multiple working parameters of UPS power supply,and directly collects AC signal on ADC sampling processing,which is different from the usual sampling processing mode.In order to ensure sampling accuracy and reduce sampling error,synchronous sampling and multi-channel simultaneous parallel are adopted.To ensure accurate acquisition of 128 points in one signal period,and to maintain the accuracy of measurement to the maximum extent,a total of 16 signal periods are collected,which greatly improves the sampling accuracy and reduces the sampling error,compared with the traditional automatic test system.It has great advantages in cost and integration,and its testing efficiency is also greatly improved,and the accuracy also meets the national standard and design requirements.The paper discusses the parameter definition and measurement principle of the backup power supply in detail,and analyzes the key factors affecting the measurement error.In particular,it gives the analysis process for the sampling method and sampling algorithm of the data acquisition module ADC,and optimizes the sampling of synchronous communication.algorithm.From both hardware and software,we strive to ensure that the acquired signal maintains real-time and integrity with the original signal.The specific hardware design circuit diagram is given.The correctness of the hardware circuit design is verified by the TI TINAsimulation software and the actual measurement of the key points.The real-time communication between the Host computer and the Slave computer is realized by the design of the Modbus bus protocol,and the LabVIEW is integrated.Machine software,built a complete test and monitoring system,the system's feasibility and reliability have been verified.This paper mainly involves the development of LabVIEW virtual instrument host computer program,data acquisition,processing,Modbus,RS-232 bus control technology,and the Slave programming of the HCS12 core based DSP,the underlying Modbus application protocol design,the driver and peripheral hardware circuit.Development,analysis and circuit design(T1 TINA)simulation.