The Design Of Multi-parameter Psychological Test Device Based On STM32

Psychological testing technology is a process of testing and analyzing the psychology of the tested person by means of computer means combined with bioelectronics and psychology.The psychological tester,referred to as the polygraph,is an electronic device designed and developed on the basis of psychological test technology.It can record information on multiple physiological reactions of the tested person.In a particular test environment,testers can use these test data to determine whether the testerer is lying.Nowadays,with the development of society,psychological testing equipment is not only widely used in the public security and judicial industry,but also plays an important role in psychological intervention,marital emotional analysis,military and other special industry political assessments,and even recruitment of personnel in enterprises and institutions.Based on the current situation of domestic psychological tester products and the development of modern electronic technology and the new requirements of the judicial system,this paper developed a multi-parameter psychological tester device based on STM32.Firstly,it introduces the development process of psychological testing technology at home and abroad,as well as the application scenarios and development trends of related technologies.At the same time,the source of this topic and the main research contents of this thesis are explained,and the contents of each chapter are arranged.Secondly,by expounding the correlation between physiological signals and psychological emotions,the theoretical basis of polygraph technology is introduced.It mainly analyzes several physiological parameters that are related to psychological testing techniques at present and are more important.After analyzing and comparing the characteristics of several feasible schemes,the hardware system of the multi-parameter psychology tester equipment was designed by using the optimization scheme,and each module was discussed in detail(including:main control chip,network communication circuit,system power supply module,AD).Hardware circuit design of data acquisition circuit,multi-channel physiological signal conditioning circuit,physiological signal acquisition and control circuit,ambient temperature and humidity acquisition circuit,etc.On the basis of analysis and research,the embedded software design and programming of related modules were completed.Adopted the "modular" and "standardized" software design concept.It mainly includes:main program module,parameter configuration module,real-time waveform data uploading module,blood pressure acquisition control module,pulse oximetry acquisition control module,temperature and humidity acquisition module,AD data acquisition module and AD data processing module.In order to utilize the powerful computing power of the host computer(PC)to integrate,analyze,cluster,and judge the psychological test information,the communication function of the upper and lower machines is designed and implemented.Finally,after the sub-modules of the software and hardware are correct,comprehensive online debugging is carried out:the various original waveform parameters collected by the system are sent to the upper PC through the communication interface,and the psychological test software performs analysis and calculation,and the prototype is performed.Verification of the joint test,and based on statistical analysis of the test results of multiple people,complete the evaluation of the performance of the entire psychoanalytic test system.