采(cai)用點陣式可加背光的液晶(jing)顯示屏,以(yi)適(shi)應橫向長(chang)度和縱向6個光柱的需要,并(bing)可在夜間(jian)方便(bian)觀察。特設帶(dai)寬(kuan)三檔變化,既(ji)(ji)照(zhao)顧(gu)測聽(ting)過(guo)程中(zhong)振動能量(liang)分(fen)布的豐(feng)富性,又可在頻率分(fen)析時更為精細(xi)。特設6個通(tong)道的存(cun)貯,既(ji)(ji)可分(fen)別(bie)將6頻段信號也可將分(fen)別(bie)6個測點的測量(liang)值進(jin)行存(cun)貯。設計的工程塑(su)料機箱和相(xiang)應面板操作均非常簡潔明快,以(yi)方便(bian)簡單的操作方式可取得(de)明確廣泛的信息,使檢漏實測工作方便(bian)易行。
檢漏(lou)(lou)儀ST—3000是用于尋(xun)找并(bing)確定供水管(guan)道漏(lou)(lou)點位置(zhi)的(de)儀器,也可用于其它壓力管(guan)道系(xi)統的(de)檢漏(lou)(lou),當管(guan)道內(nei)流體在(zai)(zai)(zai)壓力下逸出時(shi),產(chan)生(sheng)噪(zao)音能(neng)沿管(guan)道傳播,或沿埋層介質(zhi)傳播到地面。檢漏(lou)(lou)儀JT—3000能(neng)沿管(guan)線或其路(lu)面上方(fang)確定漏(lou)(lou)點位置(zhi)。ST—3000是采(cai)用低(di)功耗微(wei)處(chu)理(li)器和高級濾波器對(dui)噪(zao)聲(sheng)進(jin)行數(shu)(shu)字(zi)化處(chu)理(li)的(de)檢漏(lou)(lou)儀器,它采(cai)用專(zhuan)門設計的(de)寬帶(dai)高靈敏度振(zhen)動傳感(gan)器(拾振(zhen)器),將(jiang)地面(或管(guan)道口)的(de)噪(zao)聲(sheng)檢拾并(bing)轉(zhuan)換(huan)為電信號,經過(guo)相應(ying)放(fang)大(da)并(bing)作(zuo)數(shu)(shu)字(zi)化濾波處(chu)理(li),以(yi)兩種顯(xian)(xian)(xian)(xian)示(shi)(shi)圖(tu)面在(zai)(zai)(zai)液晶顯(xian)(xian)(xian)(xian)示(shi)(shi)屏上顯(xian)(xian)(xian)(xian)示(shi)(shi),注(zhu)意(yi)到漏(lou)(lou)水噪(zao)聲(sheng)為連續信號,在(zai)(zai)(zai)數(shu)(shu)字(zi)化處(chu)理(li)中用對(dui)連續噪(zao)聲(sheng)的(de)6個頻段輪翻檢測的(de)方(fang)法,產(chan)生(sheng)6個顯(xian)(xian)(xian)(xian)示(shi)(shi)直方(fang)柱,而對(dui)突發沖擊干(gan)擾進(jin)行抑制(不顯(xian)(xian)(xian)(xian)示(shi)(shi))。又注(zhu)意(yi)到外(wai)界干(gan)擾的(de)可能(neng)疊加,而在(zai)(zai)(zai)取值相應(ying)時(shi)間內(nei)采(cai)用zui小值取值法,并(bing)給出相應(ying)數(shu)(shu)值顯(xian)(xian)(xian)(xian)示(shi)(shi),以(yi)便(bian)zui大(da)限度的(de)抑制外(wai)界干(gan)擾。
1.2 儀器結構(gou)
檢漏(lou)儀(yi)ST—3000裝在一個PVC壓注型(xing)鋁合(he)(he)金箱(xiang)內,儀(yi)器機(ji)箱(xiang)長×寬(kuan)×高(gao)為230×95×108,機(ji)箱(xiang)由上下(xia)兩部分合(he)(he)成,上部為裝載電路的主箱(xiang)體,高(gao)80mm,下部為裝載電(dian)池的底蓋,高28mm,合成后總高度為108mm,上半(ban)體由機箱正(zheng)方面看,左(zuo)半(ban)部為(wei)液晶顯(xian)示(shi)屏幕(mu),屏幕(mu)窗口下有保護玻璃,右半(ban)部為(wei)操作面板。
操作面板(ban)右(you)側(ce)有一寬(kuan)約3.6cm斜(xie)槽。斜(xie)面(mian)上(shang)有拾振器(qi)插座和耳機(ji)(ji)插孔(kong),在(zai)(zai)斜(xie)槽一(yi)(yi)側的箱(xiang)體上(shang)下蓋(gai)間有一(yi)(yi)電(dian)(dian)(dian)(dian)池充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)座孔(kong)。機(ji)(ji)箱(xiang)底(di)(di)蓋(gai)與上(shang)部用(yong)螺絲擰緊為(wei)一(yi)(yi)體,底(di)(di)蓋(gai)上(shang)有裝(zhuang)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)池組(zu)(zu)(zu)的盒,電(dian)(dian)(dian)(dian)池組(zu)(zu)(zu)放(fang)(fang)入此盒內(nei),并以插件與機(ji)(ji)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路(lu)相連(lian)(lian),電(dian)(dian)(dian)(dian)池盒有一(yi)(yi)帶暗扣的蓋(gai)板,取出(chu)或(huo)放(fang)(fang)入電(dian)(dian)(dian)(dian)池組(zu)(zu)(zu)時(shi),從暗扣處上(shang)扳(ban)即可(ke)(ke)打(da)開(kai)蓋(gai)板,十分(fen)方便。電(dian)(dian)(dian)(dian)池組(zu)(zu)(zu)為(wei)6節(jie)鎳氫電(dian)(dian)(dian)(dian)池組(zu)(zu)(zu)裝(zhuang),在(zai)(zai)節(jie)約(yue)電(dian)(dian)(dian)(dian)源的情況(kuang)下,充(chong)(chong)(chong)(chong)(chong)滿一(yi)(yi)次電(dian)(dian)(dian)(dian)(1900MAH)可(ke)(ke)使用(yong)35小時(shi)以上(shang),在(zai)(zai)使用(yong)背景燈連(lian)(lian)續(xu)工作(zuo)亦(yi)不少(shao)于(yu)10小時(shi),為(wei)用(yong)戶有可(ke)(ke)能急用(yong)儀器(qi)而(er)來不及充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian),隨機(ji)(ji)另配一(yi)(yi)組(zu)(zu)(zu)相同充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)池。充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)可(ke)(ke)用(yong)專配充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)在(zai)(zai)機(ji)(ji)箱(xiang)內(nei)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian),也可(ke)(ke)以在(zai)(zai)機(ji)(ji)外(wai)對電(dian)(dian)(dian)(dian)池組(zu)(zu)(zu)單獨(du)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)以電(dian)(dian)(dian)(dian)池無(wu)存電(dian)(dian)(dian)(dian)情況(kuang)下連(lian)(lian)續(xu)充(chong)(chong)(chong)(chong)(chong)10小時(shi)為(wei)宜。
1.3 技術參數(shu)
a、放大(da)倍數 100dB內(nei)可調
b、頻率分析(xi)寬度 70~4000HZ范圍(wei),近5個(ge)倍頻程,三種帶(dai)寬。
c、頻率分檔 1:100HZ
(中心頻率)2:200HZ
3:400HZ
4:800HZ
5:1500HZ
6:3000HZ
d、帶(dai)寬 1:窄(zhai)帶(dai):標示(shi)符號
2:中寬帶:標(biao)示符號
3:寬(kuan)帶:標示(shi)符號
e、兩種模式顯示:
1)橫(heng)向單條柱狀顯示(shi)
2)縱向6條柱狀顯示(shi)
f、數值顯示(shi):在顯示(shi)條上(shang)對應,取樣值作zui小值以0~100間相對量值顯示(shi)。
g、屏幕70×40mm LCD顯(xian)示窗
h、LCD背景燈有通(tong)斷控制(zhi)并在zui后(hou)一(yi)次操作(zuo)3分后(hou)自動關(guan)閉。
i、供電方式:6×1.2V可(ke)充電(dian)電(dian)池一組(zu)。
j、電池充滿后
供電工(gong)作時(shi)間≥35小(xiao)時(shi)(無背景(jing)燈)
k、存儲(chu)6次測(ce)量值,分儲(chu)6通道(dao)并可分別查(cha)看。
l、消音按鈕:附于(yu)手柄
m、操作溫度:-10℃~+50℃
n、存放(fang)溫度:-10℃~+70℃
o、儀器箱尺寸(L×W×D):450×310×142 mm
p、重(zhong)量(liang):JT—3000主機箱內(nei)件(包括電池)1.2kg
JT—3000拾振(zhen)器(qi)(附座插連線) 0.6kg
手提箱包總重 5.2kg
1.4 供貨配置
放大器 1只(內(nei)置鎳(nie)氫電池組)
拾振(zhen)器 1只
聽音桿 1付
耳 機 1付
充電器 1只
說明書 1本
保(bao)修卡(ka) 1份
手提鋁合金包裝箱 1只
備用電池組 1塊