Automatic test system of sound surface filtering device

Abstract

An automatic measuring system for a surface acoustic wave filter device is composed of a measurement fixture, a network analyzer, a GPIB-PCI switching circuit, a computer, a human-machine interface, and an I / O interface circuit which are connected. The filter device is inserted in the measurement fixture, and the network analyzer scans the filter device to acquire testing parameters; the acquired testing parameters are output by a GPIB interface of the network analyzer and read in the computer by the GPIB-PCI switching circuit; the testing of the filter device is finished by an algorithm which is built in the computer; and finally the testing result is output and stored, and the computer automatically finishes the output of a grading signal by the I / O interface circuit. The setting of the network analyzer can be changed by the human-machine interface, or the testing can be directly finished in the computer by selecting the testing parameters of the surface acoustic wave filter device. The automatic measuring system can simultaneously measure a plurality of parameters without personnel participation during the data testing for once, and has the functions of parameter setting, data analysis, data storage, diagram generation and printing. The grading output signal is provided to control a grading mechanism to grade products.

Description

technical field [0001] The invention relates to a testing system for automatic testing and performance analysis of parameters of a surface acoustic wave filter device. Background technique [0002] Surface acoustic wave filter devices are also known as surface acoustic filter devices. Because of their strong anti-interference ability, small size, and no noise, they have a large market demand, a wide variety of specifications, and many manufacturers. At present, the main test method of surface acoustic wave filter devices is to use the network analyzer connected to the measurement fixture to perform parameter testing manually. The network analyzer is composed of three major connections: the sweep signal source, the detector and the receiver. , under the control of the microprocessor installed in the detector, the reflection characteristics or transmission characteristics of the device to be tested are scanned, and the test parameters are collected. Large and uncertain factor...

AI Technical Summary

Problems solved by technology

[0003] The applicant has carried out research and improvement on the above-mentioned problems of using network analyzers to perform parameter testing manually, and provides a multifunctional automatic testing system for surface acoustic filter devices. In the process of testing parameters, the network analyzer collects test parameters Finally, there is no need to manually analyze and judge the collected parameters and parameter testing, and multiple parameters can be measured at the same time

Images