A Configuration-Based Automatic Test System for Armored Vehicle Information Acquisition Devices
Against the situation that traditional armored vehicle information acquisition device can have multiple models, variable structures, long manual test cycle, complex test steps, low reliability, and other drawbacks, a configuration-based automatic test system for armored vehicle information acquisition devices is designed to realize the various performance testing. The system uses a combination of hardware and software virtual instrument technology which provides the ability to flexibly configure the test information. In addition, the test cases can be automatically configured and executed; the test results are automatically generated.
KeywordsAcquisition device Automatic testing Configuration-based
Due to the increasing requirements in the performance of tanks and armored vehicles, the use of advanced electromechanical equipment is in great demand, and armored vehicles are developing in the direction of informatization. While the information system is an important part of tanks and armored vehicles, information acquisition device is the core electrical equipment of information system. The information acquisition device needs to collect the working status of various equipment and various types of sensor signals to ensure the normal operation of the entire armored vehicle system and that the system state is under full surveillance. At the same time, it provides the vehicle’s fault diagnosis information for the crews to reduce the driving burden. For different types of tanks or armored vehicles, the classes and quantities of signals collected by the information acquisition device are disparate, and the correctness of the information collected by the acquisition device will directly affect the performance of the tank control system. Therefore, the test of the information acquisition device for tanks and armored vehicles is of great significance for the study of its performance and function, a stable and reliable information acquisition device and measurement/control system are necessary to guarantee the functions and action decisions of various parts of the vehicle. Due to the variety of information acquisition device types, the use of different test benches to build the test circuit has high labor intensity and low working efficiency; the manual control test method is easy to produce misjudgment; the degree of automation is low and high skilled maintenance personnel are needed. With the development of computer, detection and electronic technologies, the development of universal, standardized and intelligent automatic test systems is the trend of automatic test systems at home and abroad. In order to examine the information acquisition devices more accurately, conveniently and quickly, the proposed system uses a configuration-based automatic test system to be able to configure different types of acquisition devices and achieve automatic testing, failing automatic alarms, indicating fault locations. It will greatly reduce the labor intensity of detection, and improve the accuracy of detection and working efficiency .
2 Overall System Design
Complete the detection of various information acquisition devices on a single detection device;
When testing, the test signal can be introduced through the external socket of the information acquisition device;
When changed to another type of information acquisition device, only some simple settings in software are needed, no additional circuit is required to set up;
Have the ability to report test results automatically for operator’s observation .
3 Main Modules of the System
3.1 Design of the Test Master Module
3.2 Design of the High-Level, High-Resistance Signal Test Circuit
3.3 Design of the High-Level, Low-Level Signal Test Circuit
It can be seen from the scheme that under the mode of relay output the circuit can output high-level and low-level, and both high level and low level have the ability of electric driving. It can test the high-level and low-level collection circuit of the information acquisition device.
3.4 Design of the Voltage Acquisition Signal Test Circuit
3.5 Design of the Resistance Signal Test Circuit
4 Software Design of the Test System
The system uses NI LabVIEW as a development tool, LabVIEW is a kind of graphical programming language, it can provide designers with a very simple and easy graphical design environment, and provides powerful simulation and data processing functions. Also, it is very suitable for the development of information acquisition device test system software and has the advantage to support the future extended use case. In addition, LabVIEW’s powerful hardware drivers, graphical interface capabilities, and convenient as well as efficient graphical programming (G language) provide a good solution for process control and industrial applications.
4.1 Operational Interface Design
For different types and quantities of information collected by the acquisition device, it is required to configure the test cases for the acquisition channels from the aspects of the type of the collected data and the valid value scope of the data. The user can configure the acquisition device test cases according to the type and quantity of signals collected by different tanks and armored vehicles. The system has good compatibility, expandability, and versatility, and can meet the user’s need that changes of collection information are also supported for the acquisition device. Thus it can be seen that the system’s basic, and the central feature is the function of configuration.
4.2 Test Case Execution Flow
Through the self-configuration of test cases, the proposed configuration-based automatic test system can automatically test multiple acquisition devices through one single system. The system has the features of good scalability, high test speed, stable system performance, friendly man–machine interface, and is easy to operate, as a result, the test efficiency has improved significantly.