暗筒式日照計

• 型   號：FJ-2型日照計
• 價   格：

FJ-2型日照計概述：
FJ-2型日照(zhao)(zhao)計(ji)(ji)，暗筒(tong)式(shi)日照(zhao)(zhao)計(ji)(ji)又稱喬唐式(shi)日照(zhao)(zhao)計(ji)(ji)，由金(jin)屬圓筒(tong)（底(di)端密閉，筒(tong)口帶蓋(gai)，兩側(ce)各(ge)有一進光小孔，筒(tong)內(nei)附(fu)有壓(ya)紙夾(jia)）、隔光板、緯(wei)度盤和(he)支架(jia)底(di)座等(deng)構成。FJ-2型日照(zhao)(zhao)計(ji)(ji)是利用太陽光通過儀器上的小孔射入筒(tong)內(nei)，使涂有感(gan)光劑的日照(zhao)(zhao)紙上留下感(gan)光跡(ji)線，來計(ji)(ji)算日照(zhao)(zhao)時數。廣泛運用于小型氣象站、環境機(ji)房、農業(ye)溫室大棚、糧庫(ku)、養(yang)(yang)殖業(ye)、花卉養(yang)(yang)殖等(deng)領域。

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一、FJ-2型(xing)暗筒式日照計基(ji)本(ben)參數： 

1、日照記錄時間：5:00～19:00

2、緯度使用范圍：0°～60°

3、記錄(lu)時間誤差：±3 min

4、外形尺寸：175×175×130mm

5、重量：0.8Kg

6、暗筒式日(ri)照計為記(ji)錄太陽不被(bei)云遮(zhe)蓋所照過的時數，并在(zai)自記(ji)紙上顯示陽光照射的起迄時間。

二、FJ-2型日(ri)照計結構原理：                                                      

暗筒(tong)(tong)式日(ri)(ri)照(zhao)(zhao)計由金屬(shu)(shu)筒(tong)(tong)身(shen)(shen)及座(zuo)(zuo)架組成，筒(tong)(tong)身(shen)(shen)兩(liang)側(ce)各有(you)小(xiao)(xiao)孔一個，分(fen)別讓上(shang)(shang)下(xia)(xia)(xia)(xia)午的日(ri)(ri)光(guang)(guang)(guang)(guang)射(she)入簡內，兩(liang)孔距離的角度120°前后位置錯開(kai)(kai)，以免(mian)上(shang)(shang)、下(xia)(xia)(xia)(xia)午回影重合(he)，筒(tong)(tong)上(shang)(shang)有(you)一隔(ge)光(guang)(guang)(guang)(guang)板(ban)(ban)，其邊緣與(yu)(yu)小(xiao)(xiao)孔組成的平(ping)面(mian)系垂直(zhi)于地(di)平(ping)面(mian)；隔(ge)光(guang)(guang)(guang)(guang)板(ban)(ban)的主要作(zuo)(zuo)用(yong)是能將上(shang)(shang)、下(xia)(xia)(xia)(xia)午日(ri)(ri)光(guang)(guang)(guang)(guang)明確分(fen)開(kai)(kai)，除真太陽(yang)時(shi)(shi)正午，兩(liang)進(jin)(jin)光(guang)(guang)(guang)(guang)孔同時(shi)(shi)進(jin)(jin)光(guang)(guang)(guang)(guang)外，其余時(shi)(shi)間(jian)均只有(you)一孔可(ke)以讓日(ri)(ri)光(guang)(guang)(guang)(guang)進(jin)(jin)入，筒(tong)(tong)身(shen)(shen)端有(you)一圓蓋住不(bu)讓日(ri)(ri)光(guang)(guang)(guang)(guang)進(jin)(jin)入，筒(tong)(tong)內有(you)一壓(ya)的彈性金屬(shu)(shu)夾是用(yong)來(lai)壓(ya)住自記紙的。該儀器安(an)置時(shi)(shi)筒(tong)(tong)身(shen)(shen)軸線(xian)要對準(zhun)正北方向，這工作(zuo)(zuo)可(ke)借助座(zuo)(zuo)架上(shang)(shang)的南北線(xian)來(lai)決定(ding)，與(yu)(yu)筒(tong)(tong)身(shen)(shen)相(xiang)連的煒(wei)度板(ban)(ban)同座(zuo)(zuo)架上(shang)(shang)指零刻線(xian)的角度需與(yu)(yu)觀(guan)測(ce)地(di)點的緯度相(xiang)合(he)，這樣使圓筒(tong)(tong)兩(liang)側(ce)固定(ding)二(er)個進(jin)(jin)光(guang)(guang)(guang)(guang)小(xiao)(xiao)孔照(zhao)(zhao)射(she)進(jin)(jin)當時(shi)(shi)陽(yang)光(guang)(guang)(guang)(guang)，在圓筒(tong)(tong)內壁(bi)安(an)有(you)自記紙，自記紙上(shang)(shang)涂有(you)感光(guang)(guang)(guang)(guang)混液，因(yin)而陽(yang)光(guang)(guang)(guang)(guang)能直(zhi)接射(she)至自記紙上(shang)(shang)留(liu)下(xia)(xia)(xia)(xia)痕(hen)跡，待(dai)日(ri)(ri)落后取(qu)出用(yong)清水(shui)漂(piao)洗，即(ji)能觀(guan)察日(ri)(ri)照(zhao)(zhao)時(shi)(shi)數(shu)與(yu)(yu)起(qi)迄時(shi)(shi)間(jian)。