Design Of Shooting Training System Based On Thin-Film Solar Cell

With the rapid development of laser technology and embedded system,live ammunition target shooting training has been replaced by laser simulation training because of its high cost,low safety factor,and serious environmental pollution.However,compared with world's military powers,the research of laser shooting simulation training system in our country is still relatively weak,there are many problems such as incomplete functions,low stability,incomplete feedback on training performance information.At present,photodiodes,single crystal silicon batteries,and other methods are used to detect laser at home and abroad.The receive surface of photodiode is small,which is easy to be dirty or other reasons cannot be detected during the training process;Ordinary silicon photovoltaic cells due to hard glass substrate,fragile and vulnerable.So far,there is no convenient and reliable laser simulation training solution suitable for a variety of environmental applications in the field.To overcome the deficiencies of existing technology,this paper designs a shooting training system based on thin-film solar cells,with a variety of functions,such as sending laser coded pulses,reporting exercise scores,checking exercise results at any time,and real-time display.Flexible thin-film solar cell is used as light detection device.In order to filter ambient light interference,flexible filter coating is installed on the surface.Because the infrared laser transmitter is used,which energy is concentrated,even if only 10%of the optical power is converted by flexible solar cell,the detection circuit can effectively determine whether there is an infrared laser spot on.Due to the special internal structure of the solar cell,the falling edge is slow when responding to the laser pulse,which will influence laserdetection so that pulse detection circuit,discharge control circuit,and discharge circuit are designed to deal with the falling edge.The detected infrared laser coded pulse frequency can reach 1KHz and the response speed is fast.Firstly,the overall planning of the system is introduced,including requirements analysis and logical architecture design.Then,the operating characteristics,advantages and disadvantages,and spectral response of the solar cell are briefly analyzed,a flexible monocrystalline silicon solar cell is selected as light detection material of the target in combination with the system requirements.In addition,according to the overall architecture of the system,a relatively complete communication protocol is determined to ensure the accuracy of data transmission between various parts of the system.Secondly,launch equipment,target equipment and computer software implementation are introduced,Launch equipment and target equipment are designed with STM32 as the core,PC software is an application based on Winform.The main task of launch equipment is to emit infrared laser signal with a certain code,includes the number of launch,the coded information of soldier,and the information of firearm,so that the training person and weapon can be automatically identified in the case of multiple persons and multiple equipment participated.The target equipment is mainly focused on the detection method of laser-encoded pulses and the discharge processing on the falling edge of the response of solar cell so that the target equipment can successfully detect and decode the infrared laser signal,and AS-TTL-100 wireless module is used to send the shooting results to the host computer software to achieve automatic target;The host computer software has the functions of sending control commands to the slave computer,displaying training situation in real time,saving shooting scores,querying historical achievements,and managing training personnel,and SQL Server 2008 is used to store the relevant data in the system,to strengthen the data security.Finally,the system was tested and test results were analyzed.The results show that the design of this paper is feasible,the system is reliable and stable,and the operation is simple,which can meet the basic needs of the military application of fire simulation training.