一種便攜式穩(wěn)譜源探測器的研制
電子技術(shù)應(yīng)用
陳通1,陳超1,李衛(wèi)強(qiáng)1,張雄輝1,葉傳濤1,劉先明2
1.中國石油測井有限公司物資裝備公司西南中心;2.長江大學(xué) 機(jī)械學(xué)院
摘要: 目前國內(nèi)專業(yè)化測井公司大多擁有內(nèi)置源上千枚,國家對(duì)放射源的管控極其嚴(yán)格,穩(wěn)譜源管控成為安全管理的關(guān)鍵環(huán)節(jié)。儀器在維修或運(yùn)輸過程中丟失或被盜,如不能及時(shí)發(fā)現(xiàn),可能導(dǎo)致人員誤照射或放射源失控風(fēng)險(xiǎn)。現(xiàn)有的放射源探測器由于涉源儀器高密度金屬外殼屏蔽、選用晶體體積小等原因,均不能檢測出儀器內(nèi)部穩(wěn)譜源信號(hào)。為解決該問題,研制了一種便攜式能譜源探測器,該裝置采用高分辨率大體積碘化鈉(NaI)晶體和光電倍增管(PMT),采用該類別檢測器獨(dú)有的峰值采樣原理,實(shí)現(xiàn)了對(duì)屏蔽后的納居里級(jí)穩(wěn)譜源快速、準(zhǔn)確的檢測。研制的穩(wěn)譜源探測器不僅操作簡便、探測效率高,而且能夠在不拆卸儀器、儀器不工作的情況下,有效識(shí)別儀器內(nèi)部的穩(wěn)譜源。
中圖分類號(hào):TL816 文獻(xiàn)標(biāo)志碼:A DOI: 10.16157/j.issn.0258-7998.245651
中文引用格式: 陳通,陳超,李衛(wèi)強(qiáng),等. 一種便攜式穩(wěn)譜源探測器的研制[J]. 電子技術(shù)應(yīng)用,2025,51(2):52-57.
英文引用格式: Chen Tong,Chen Chao,Li Weiqiang,et al. Development of a portable stable spectrum source detector[J]. Application of Electronic Technique,2025,51(2):52-57.
中文引用格式: 陳通,陳超,李衛(wèi)強(qiáng),等. 一種便攜式穩(wěn)譜源探測器的研制[J]. 電子技術(shù)應(yīng)用,2025,51(2):52-57.
英文引用格式: Chen Tong,Chen Chao,Li Weiqiang,et al. Development of a portable stable spectrum source detector[J]. Application of Electronic Technique,2025,51(2):52-57.
Development of a portable stable spectrum source detector
Chen Tong1,Chen Chao1,Li Weiqiang1,Zhang Xionghui1,Ye Chuantao1,Liu Xianming2
1.Southwest Center of Material Equipment Company, China Petroleum Logging Company Limited;2.School of Mechanical Engineering, Yangtze University
Abstract: Domestic logging companies currently possess thousands of built-in sources. The national control over radioactive sources is extremely stringent, making the management of stable spectrum sources a critical aspect of safety management. During maintenance or transportation, the instruments may be lost or stolen. If these situations are not promptly detected, it may lead to accidental radiation exposure of personnel or the risk of uncontrolled radioactive sources. Existing radiation source detectors are unable to detect the internal stable spectrum source signals of the instruments due to the shielding of high-density metal casings and the small volume of selected crystals. To address this issue, this paper develops a portable energy spectrum source detector. The device employs a high-resolution, large-volume sodium iodide (NaI) crystal and a Photomultiplier Tube (PMT), and utilizes the unique peak sampling principle of this class of detectors, achieving rapid and accurate detection of the shielded nanocurie-level stable spectrum source. The developed stable spectrum source detector is not only easy to operate and highly efficient in detection but also effectively identifies the stable spectrum sources inside the instruments without the need to disassemble them or when the instruments are not in operation.
Key words : scintillation crystal;photomultiplier tube;circuit design;peak sampling
引言
油氣測井技術(shù)是油氣勘探與開發(fā)中不可或缺的一部分,它通過測量地層中的物理參數(shù)來評(píng)估油氣藏的潛力。在這一過程中,內(nèi)置穩(wěn)譜源作為調(diào)節(jié)放射性測井儀器穩(wěn)定性的重要手段,對(duì)于確保測井?dāng)?shù)據(jù)的準(zhǔn)確性和可靠性起著至關(guān)重要的作用[1]。現(xiàn)有的檢測手段無法在不拆卸儀器的情況下有效識(shí)別儀器內(nèi)部是否含有穩(wěn)譜源,目前國內(nèi)放射源檢測裝置受限于靈敏度基本無法有效檢測儀器內(nèi)置穩(wěn)譜源[2]。常規(guī)檢查方法都是對(duì)儀器進(jìn)行通電檢查,觀察譜峰來確定穩(wěn)譜源的有無。儀器維修過程中出現(xiàn)穩(wěn)譜源未安裝情況,或在運(yùn)輸過程中丟失或被盜,如果不能及時(shí)發(fā)現(xiàn),可能導(dǎo)致人員誤照射或放射源失控的風(fēng)險(xiǎn)[3]。為了解決這一問題,本文提出了一種便攜式核測井儀器內(nèi)置穩(wěn)譜源檢測裝置的研制方案,旨在通過技術(shù)創(chuàng)新提高穩(wěn)譜源檢測的效率和準(zhǔn)確性。
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作者信息:
陳通1,陳超1,李衛(wèi)強(qiáng)1,張雄輝1,葉傳濤1,劉先明2
(1.中國石油測井有限公司物資裝備公司西南中心,重慶 400023;
2.長江大學(xué) 機(jī)械學(xué)院,湖北 荊州 434023)
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