【正文】
發(fā)射管的排列圖發(fā)射部分,接收部分經(jīng)調(diào)試后,都沒(méi)有出現(xiàn)什么錯(cuò)誤,即可發(fā)射音頻信號(hào)并在2米遠(yuǎn)處接收到信號(hào),只是接收到的信號(hào)聲中有一些雜聲。如果我們將一個(gè)變化小的信號(hào)加到基極跟發(fā)射極之間,這就會(huì)引起基極電流的變化,的變化被放大后,導(dǎo)致了很大的變化。引腳2為反相輸入端,3為同相輸入端;引腳5為輸出端;引腳6和4分別為電源和地;引腳1和8為電壓增益設(shè)定端;使用時(shí)在引腳7和地之間接旁路電容,通常取10。第二級(jí)為共射放大電路,T7為放大管,恒流源作有源負(fù)載,以增大放大倍數(shù)。 所示: 紅外線發(fā)射模塊框圖 紅外線發(fā)射電路圖 紅外光接收模塊功能介紹利用紅外發(fā)光管接收信號(hào),將接收到的信號(hào)通過(guò)三極管將電壓放大,再通過(guò)LM386將功率放大,必須進(jìn)行增益調(diào)節(jié),就要用到可變電阻,本設(shè)計(jì)中要調(diào)試使其能達(dá)到較大的增益,最后通過(guò)簡(jiǎn)單地驅(qū)動(dòng)電路,輸送到揚(yáng)聲器。(2) 紅外光發(fā)射模塊: 采用三極管與LM368放大后的發(fā)射模塊。方案二:利用單片機(jī)STC89C52對(duì)輸入模擬信號(hào)進(jìn)行控制,由于輸入的模擬信號(hào)很小,距離很短,要是想實(shí)現(xiàn)遠(yuǎn)距離傳輸,還需要通過(guò)單片機(jī)對(duì)輸入的模擬信號(hào)進(jìn)行A/D轉(zhuǎn)換,將輸入的模擬信號(hào)變?yōu)閿?shù)字信號(hào),即可遠(yuǎn)距離傳輸,但是電路很復(fù)雜,而且需要程序,如果單片機(jī)學(xué)不好的,程序很難寫(xiě)出來(lái),操作繁瑣。IC采用集成穩(wěn)壓器,并帶有電流旁電路,是7805穩(wěn)壓器輸出級(jí)不易被損壞,能夠很好的輸出5V電壓,而且成本低,電路簡(jiǎn)單,操作簡(jiǎn)便。 總體設(shè)計(jì)方案紅外線通信系統(tǒng)的構(gòu)成,它由3個(gè)部分組成:電源模塊,紅外線發(fā)射模塊,紅外線接收模塊。它就會(huì)反射,這一特點(diǎn),確定了每套設(shè)備之間,可以在不同的物理空間里使用。信息網(wǎng)關(guān)負(fù)責(zé)連接信息終端和互聯(lián)網(wǎng)。關(guān)鍵詞:紅外線發(fā)射管 紅外線接收管 LM386音頻集功放器 I AbstractInfrared ray is close, a means of highspeed wireless munication, as a kind of close, indoor means of munication, infrared has inparable advantage over radio.System is introduced in this paper by using the infrared munication channel constitute the infrared wireless shortrange equipment control system, can meet the needs of the wireless control. This article mainly expounds the working principle and implementation method of infrared munication, infrared wireless munication process, a detailed analysis of each module of the system design, the best scheme of this system are derived, successfully pleted the design of the system. This system is divided into three modules: voice module, the infrared emission module, the infrared receiving module. Power supply module adopts the 7805 of 5 v power supply. mainly used in infrared emission module triode, LM386 will receive the signal voltage amplifier and power amplifier and infrared transmitting tube. Mainly used in infrared receiving module triode, LM386 will re