Virtual instrumentation technology of automatic detection systems 705D radar

Discussion on the use of virtual instrumentation technology, through the preparation of specific test software, achieving 705D radar days charged, Rotary, distance measurement subsystems, emission control panels and three-way + 15V voltage 16 important parameters for automatic detection of the method and means.

"Instrument based virtual 705D of radar detection system" chart as shown in Figure 1.

It consists of a central computer, virtual instruments, test hardware. Test hardware is on the radar of 16 705D important parameters for data conditioning and data acquisition for carriers, it provides functional modules required interface of all kinds, as well as various types of input and output signal isolation amplifier. A central computer is the control center, it first through the high-speed i/o card, switch card number deal with measurement of radar system parameters select the judgment, to determine on the subsystems for testing the various signal, after which the signal source card requesting, signal source card output all the desired signal, after -to-analog conversion card converted to or direct output to the radar functional modules required for analog signals and digital signals. After the computer and then through data acquisition card, oscilloscope, logical Analyzer etc will work State radar system of various digital and analog signal acquisition, storage, software analysis, and radar system parameters measured the subsystem in working order. If an exception occurs, immediately alerts the operator, according to fault the bootstrapper, exclude the subsystem failure.

"Virtual instrument based circuit radar failure automatic detection system" test on a test boot software, the software using Visual Basic6.0 establishment, the flowchart shown in Figure 2.

The entire program provides users with an intelligent, automated test environment and test interface testing personnel simply follow the test interface Guide, you can automatically complete the circuit malfunction automated radar detection.

In the action interface, first select the measured SAR of function modules, and various radar detection of different functional modules, methods, means, each functional module has its specific detection algorithm.

Enter the function module test radar steps, starting with text, video, pictures and other multimedia information prompt action in accordance with the test requirements connected with the individual interface module, after testing platform to power, IPC began to enter the automatic detection process, including the output of the desired signal, step-by-step collection of different response signal, then the acquisition to signal processing, analysis, and fault dictionary database comparison, display the test results and the point of failure; according to the need for data storage and printable, end the detection process. Testers can repeatedly loop measurement or select another function module test.

In order to simplify the code to improve the program's operating efficiency, the development of a common procedure to implement database initialization.

Code is as follows:

SSTab control's text box, picture boxes, command buttons, radio buttons and other controls, and a field in the database, the database to initialize the binding, the control displays the information content of the bid by the database.

Judgment of the results is also the field values in the database. In order to increase the readability of your program, use the playback controls GIF89 test point locations indicates that the animation, the use of the PICTURE control to display the test point of wave picture; test point location indicates the use of GIF animation format, GIF animation, small size, shows clearly that consume system resources. Waveform using JPG format, the little disk space.

IPC and various tabbed instrument composed of 705D radar automatic test system for testing process automation, ensuring the system's high reliability, improve measurement speed and accuracy.

Through the software modifications and added a little bit of interface, system functionality can be extended. Practice has proved that the application of the test system in overcoming the drawbacks of traditional instruments, modern testing technology and computer technology integration, enhanced test functionality, HMI optimized so that radar circuit fault testing leap to a new level, to the degree of automation is low and feature a single desktop instrument of renewal has opened a new technical approaches.