自動(dong)門(men)遙控器系統的組(zu)成 ;影響自動(dong)門(men)遙控器遙控距(ju)離(li)的因素有(you)哪些
自動門遙控器系統的組成
常用的自動門(men)遙控系統(tong)一般分(fen)發射和接(jie)收兩個部(bu)分(fen)。
發射(she)部分一(yi)般分為兩(liang)種類型,即遙控(kong)(kong)器(qi)與發射(she)模(mo)塊(kuai),遙控(kong)(kong)器(qi)和遙控(kong)(kong)模(mo)塊(kuai)是對于使用方式來說的,遙控(kong)(kong)器(qi)可以(yi)當(dang)一(yi)個整機(ji)來獨立使用,對外引出線(xian)有(you)接線(xian)樁(zhuang)頭;而遙控(kong)(kong)模(mo)塊(kuai)在電(dian)路(lu)中
當一(yi)個元件(jian)來(lai)使(shi)用(yong)(yong)(yong),根(gen)據(ju)其引腳(jiao)定義進行(xing)應用(yong)(yong)(yong),使(shi)用(yong)(yong)(yong)遙控模塊的優勢在于可以和應用(yong)(yong)(yong)電路(lu)天衣無(wu)縫的連接、體積(ji)小、價(jia)格低(di)、物盡其用(yong)(yong)(yong),但使(shi)用(yong)(yong)(yong)者必須真(zhen)正懂(dong)得(de)電路(lu)原理,否則(ze)還是用(yong)(yong)(yong)遙控器來(lai)的方便(bian)。
接(jie)收(shou)(shou)部分一般(ban)來說也分為(wei)兩(liang)種類型,即超(chao)外差與(yu)超(chao)再生(sheng)接(jie)收(shou)(shou)方(fang)式,超(chao)再生(sheng)解(jie)(jie)調(diao)電(dian)(dian)(dian)(dian)路(lu)(lu)也稱超(chao)再生(sheng)檢(jian)波電(dian)(dian)(dian)(dian)路(lu)(lu),它(ta)實際上(shang)是工作在間歇振蕩(dang)狀態(tai)下(xia)的(de)再生(sheng)檢(jian)波電(dian)(dian)(dian)(dian)路(lu)(lu)。超(chao)外差式解(jie)(jie)調(diao)電(dian)(dian)(dian)(dian)路(lu)(lu)與(yu)超(chao)外差收(shou)(shou)音機(ji)(ji)相(xiang)同,它(ta)是設置一本機(ji)(ji)振蕩(dang)電(dian)(dian)(dian)(dian)路(lu)(lu)產生(sheng)振蕩(dang)信號(hao)(hao),與(yu)接(jie)收(shou)(shou)到的(de)載頻(pin)信號(hao)(hao)混頻(pin)后,得到中(zhong)頻(pin)(一般(ban)為(wei)465kHz)信號(hao)(hao),經(jing)中(zhong)頻(pin)放(fang)大和檢(jian)波,解(jie)(jie)調(diao)出數(shu)據信號(hao)(hao)。由于載頻(pin)頻(pin)率(lv)是固(gu)定(ding)的(de),所(suo)以其電(dian)(dian)(dian)(dian)路(lu)(lu)要(yao)比收(shou)(shou)音機(ji)(ji)簡單一些。超(chao)外差式的(de)接(jie)收(shou)(shou)器(qi)穩定(ding)、靈敏(min)度高、抗干擾(rao)能力也相(xiang)對較好;超(chao)再生(sheng)式的(de)接(jie)收(shou)(shou)器(qi)體積小、價格便(bian)宜。
自動門遙控器遙控距離的影響因素
影(ying)響自(zi)動(dong)門(men)遙控(kong)距離(Remote distance of RF Remote Control)的因素主要有(you)如下幾點(dian):
1、發(fa)射(she)功(gong)率:發(fa)射(she)功(gong)率大則(ze)距離遠,但(dan)耗電(dian)大,容易產生干擾;
2、接收靈敏(min)度(du):接收器的接收靈敏(min)度(du)提高,遙控(kong)距離增大,但容(rong)易受干擾造成誤動或失控(kong);
3、天線:采用直(zhi)(zhi)線型天線,并且(qie)相互平行,遙(yao)控距離遠(yuan),但占據空間大,在使用中把(ba)天線拉長(chang)、拉直(zhi)(zhi)可增加(jia)遙(yao)控距離;
4、高度(du):天線(xian)越高,遙控(kong)距離越遠,但受(shou)客(ke)觀條件(jian)限制;
5、阻擋:無(wu)線(xian)遙(yao)控器(qi)使用國家規定的(de)UHF頻(pin)段,其(qi)傳(chuan)播特性和(he)光近似,直(zhi)線(xian)傳(chuan)播,繞(rao)射較小,發射器(qi)和(he)接收(shou)器(qi)之間如有墻(qiang)壁阻擋將(jiang)大大打(da)折遙(yao)控距離(li),如果(guo)是鋼筋混泥土的(de)墻(qiang)壁,由(you)于導體對電波的(de)吸收(shou)作(zuo)用,影響更甚。