次聲監(jiān)測站由我司自主研發(fā),該產(chǎn)品具有采集頻率高、功耗低、穩(wěn)定可靠的顯著特點,主要適用于泥石流成災(zāi)次聲信號、巖土體內(nèi)部破裂次聲信號的捕捉和檢測,可實現(xiàn)臨災(zāi)預(yù)警。
次聲監(jiān)測站由我司自主研發(fā),該產(chǎn)品具有采集頻率高、功耗低、穩(wěn)定可靠的顯著特點,主要適用于泥石流成災(zāi)次聲信號、巖土體內(nèi)部破裂次聲信號的捕捉和檢測,可實現(xiàn)臨災(zāi)預(yù)警。
一、主要特點
(1) 采樣頻率高:據(jù)信號采樣定律,結(jié)合次聲信號頻段,基礎(chǔ)采樣頻率為 100Hz ,滿足次聲信號檢測,識別要求;
(2) 前端邊緣計算:前端搭載計算性能*的處理芯片, 內(nèi)嵌濾波算法,較好解決了已知信號源干擾問題,前端積分獲得有效聲壓數(shù)據(jù);
(3) 可靠的傳輸機(jī)制,結(jié)合應(yīng)用場景實際情況,可選多種通訊機(jī)制,確保觀測量能及時順暢的傳輸至云端;
(4) 后臺數(shù)據(jù)分析處理:遵循原始信號濾波——時間域——頻率域——時頻域分析流程,快速檢測出異常信號;
(5) 預(yù)警:可選短信、APP 、郵件等多種方式接收預(yù)警信息及預(yù)警簡報;
( 6) 安裝部署:擁有自主知識產(chǎn)權(quán)的安裝部署方案,從適用角度克服已知噪聲干擾。
( 7) 采用鋁材整銑外殼、密封膠圈、防摔軟膠設(shè)計,具有優(yōu)秀的防摔,減震性能,很好的滿足戶外應(yīng)用場景需求。
二、工作條件
工作電壓:12V~36 V;
瞬時最大電流:≤5A;
工作電流:10mA~ 120mA;
額定功耗:小于 1.2W;
工作溫度:-40℃~85℃;
工作濕度:95%RH 無凝露
三、技術(shù)指標(biāo)
1 測量范圍 :5Hz ~20kHz±2dB
2 靈敏度 :50mV/Pa
3 本地噪聲 :小于 17dBm
4 采樣頻率 :不小于 100Hz
5 通訊方式 :RS232 、4G 通訊方式、電臺通訊、光纖通訊
6 工作溫度 :-40℃~85℃
7 工作濕度 :95%RH 無凝露
8 沖擊/震動 :可抗擊 2m 自由跌落
9 供電方式 :12~36V 直流寬電壓供電
10 重量 :1.5kg
11 軟件概述 :支持動態(tài)解算與檢測,實時輸出預(yù)警結(jié)果
四、監(jiān)測系統(tǒng)架構(gòu)
監(jiān)測站主要包括電容式次聲信號傳感器、供電系統(tǒng) (采用太陽能+鋰電池供電)、監(jiān)測核心單元(采發(fā)設(shè)備)、通訊系統(tǒng)(4G 通訊模塊)組成。其中傳感器頻帶范圍 0.5Hz-300Hz ,靈敏度 50mV/Pa,覆蓋泥石流成災(zāi)/巖土體破裂產(chǎn)生次聲波整個頻段,確保能接收到可信的次聲信號,在國內(nèi)處于水平。監(jiān)測主板是適用于野外低功耗、高靈敏度的地質(zhì)災(zāi)害監(jiān)測數(shù)據(jù)采集與傳輸設(shè)備。多通道通道數(shù)據(jù)采集;A/D 分辨率:24 位;無線傳輸方式:4G/GPRS;防護(hù)等級 IP67;GPS 模塊同步授時,誤差小于 0. 1ms。
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