(?) (?)
导(Dao)热(Re)系(Xi)数(Shu)测(Ce)试(Shi)仪(Yi)的(De)不(Bu)同(Tong)测(Ce)试(Shi)特(Te)性(Xing)说(Shuo)明(Ming)
(?) (?)导(Dao)热(Re)系(Xi)数(Shu)测(Ce)试(Shi)仪(Yi)根(Gen)据(Ju)GB/T相(Xiang)关(Guan)标(Biao)准(Zhun)的(De)要(Yao)求(Qiu)设(She)计(Ji)制(Zhi)作(Zuo),(?)主(Zhu)要(Yao)用(Yong)于(Yu)检(Jian)测(Ce)各(Ge)种(Zhong)硬(Ying)质(Zhi)材(Cai)料(Liao)导(Dao)热(Re)性(Xing)能(Neng)。(?)本(Ben)设(She)备(Bei)可(Ke)一(Yi)次(Ci)性(Xing)装(Zhuang)载(Zai)多(Duo)个(Ge)试(Shi)样(Yang),(?)每(Mei)个(Ge)试(Shi)样(Yang)测(Ce)试(Shi)时(Shi)间(Jian)40-90min,(?)测(Ce)试(Shi)速(Su)度(Du)快(Kuai),(?)测(Ce)试(Shi)过(Guo)程(Cheng)无(Wu)需(Xu)人(Ren)员(Yuan)参(Can)与(Yu),(?)测(Ce)试(Shi)结(Jie)果(Guo)由(You)电(Dian)脑(Nao)自(Zi)动(Dong)记(Ji)录(Lu),(?)试(Shi)件(Jian)侧(Ce)面(Mian)贴(Tie)条(Tiao)码(Ma),(?)通(Tong)过(Guo)条(Tiao)码(Ma)扫(Sao)描(Miao)仪(Yi)进(Jin)行(Xing)自(Zi)动(Dong)识(Shi)别(Bie),(?)自(Zi)动(Dong)读(Du)取(Qu),(?)测(Ce)试(Shi)数(Shu)据(Ju)与(Yu)试(Shi)件(Jian)一(Yi)一(Yi)对(Dui)应(Ying),(?)不(Bu)会(Hui)出(Chu)现(Xian)以(Yi)往(Wang)人(Ren)工(Gong)记(Ji)录(Lu)数(Shu)据(Ju)与(Yu)试(Shi)件(Jian)不(Bu)匹(Pi)配(Pei)的(De)情(Qing)况(Kuang),(?)另(Ling)外(Wai)自(Zi)动(Dong)上(Shang)下(Xia)试(Shi)件(Jian),(?)极(Ji)大(Da)减(Jian)少(Shao)了(Liao)人(Ren)工(Gong)成(Cheng)本(Ben),(?)15个(Ge)试(Shi)件(Jian)仅(Jin)需(Xu)人(Ren)工(Gong)5-10分(Fen)钟(Zhong)即(Ji)可(Ke)完(Wan)成(Cheng)。(?)
(?) (?)1.平(Ping)面(Mian)热(Re)源(Yuan)法(Fa)
(?) (?)非(Fei)稳(Wen)态(Tai)平(Ping)面(Mian)热(Re)源(Yuan)法(Fa)((?)包(Bao)括(Kuo)脉(Mai)冲(Chong)平(Ping)面(Mian)热(Re)源(Yuan)法(Fa)和(He)阶(Jie)跃(Yue)平(Ping)面(Mian)热(Re)源(Yuan)法(Fa))(?)可(Ke)测(Ce)量(Liang)均(Jun)质(Zhi)固(Gu)体(Ti)材(Cai)料(Liao)、(?)非(Fei)均(Jun)质(Zhi)材(Cai)料(Liao)以(Yi)及(Ji)多(Duo)孔(Kong)材(Cai)料(Liao),(?)只(Zhi)需(Xu)测(Ce)量(Liang)试(Shi)样(Yang)内(Nei)某(Mou)一(Yi)点(Dian)的(De)温(Wen)度(Du)变(Bian)化(Hua)就(Jiu)可(Ke)同(Tong)时(Shi)得(De)到(Dao)材(Cai)料(Liao)的(De)导(Dao)热(Re)系(Xi)数(Shu)和(He)热(Re)扩(Kuo)散(San)率(Lu)以(Yi)及(Ji)体(Ti)积(Ji)热(Re)容(Rong)等(Deng)多(Duo)个(Ge)热(Re)物(Wu)性(Xing)参(Can)数(Shu)。(?)
(?) (?)给(Gei)平(Ping)面(Mian)热(Re)源(Yuan)通(Tong)以(Yi)阶(Jie)跃(Yue)式(Shi)的(De)加(Jia)热(Re)电(Dian)流(Liu),(?)同(Tong)时(Shi)用(Yong)热(Re)电(Dian)偶(Ou)或(Huo)热(Re)电(Dian)阻(Zu)元(Yuan)件(Jian)测(Ce)量(Liang)距(Ju)热(Re)源(Yuan)为(Wei)x位(Wei)置(Zhi)处(Chu)材(Cai)料(Liao)的(De)温(Wen)度(Du)变(Bian)化(Hua)T(x,t),(?)根(Gen)据(Ju)热(Re)源(Yuan)—试(Shi)样(Yang)测(Ce)量(Liang)系(Xi)统(Tong)的(De)传(Chuan)热(Re)数(Shu)学(Xue)模(Mo)型(Xing)及(Ji)其(Qi)非(Fei)稳(Wen)态(Tai)导(Dao)热(Re)方(Fang)程(Cheng)的(De)解(Jie)析(Xi)解(Jie),(?)可(Ke)以(Yi)确(Que)定(Ding)被(Bei)测(Ce)材(Cai)料(Liao)试(Shi)样(Yang)的(De)热(Re)物(Wu)性(Xing)参(Can)数(Shu)。(?)
(?) (?)2.热(Re)带(Dai)法(Fa)
(?) (?)热(Re)带(Dai)法(Fa)测(Ce)量(Liang)原(Yuan)理(Li)类(Lei)似(Si)于(Yu)热(Re)线(Xian)法(Fa),(?)不(Bu)同(Tong)之(Zhi)处(Chu)是(Shi)用(Yong)很(Hen)薄(Bao)的(De)窄(Zhai)金(Jin)属(Shu)带(Dai)((?)热(Re)带(Dai))(?)来(Lai)替(Ti)代(Dai)热(Re)线(Xian)。(?)实(Shi)验(Yan)中(Zhong)将(Jiang)薄(Bao)金(Jin)属(Shu)带(Dai)夹(Jia)持(Chi)在(Zai)待(Dai)测(Ce)材(Cai)料(Liao)中(Zhong)间(Jian),(?)从(Cong)某(Mou)时(Shi)刻(Ke)起(Qi)以(Yi)恒(Heng)定(Ding)电(Dian)功(Gong)率(Lu)加(Jia)热(Re)金(Jin)属(Shu)带(Dai),(?)测(Ce)量(Liang)并(Bing)记(Ji)录(Lu)热(Re)带(Dai)的(De)温(Wen)度(Du)响(Xiang)应(Ying)曲(Qu)线(Xian),(?)根(Gen)据(Ju)温(Wen)度(Du)变(Bian)化(Hua)的(De)理(Li)论(Lun)公(Gong)式(Shi)可(Ke)同(Tong)时(Shi)得(De)到(Dao)被(Bei)测(Ce)材(Cai)料(Liao)的(De)导(Dao)热(Re)系(Xi)数(Shu)和(He)热(Re)扩(Kuo)散(San)率(Lu)。(?)热(Re)带(Dai)法(Fa)可(Ke)以(Yi)测(Ce)量(Liang)液(Ye)体(Ti)、(?)松(Song)散(San)材(Cai)料(Liao)、(?)多(Duo)孔(Kong)介(Jie)质(Zhi)及(Ji)非(Fei)金(Jin)属(Shu)固(Gu)体(Ti)材(Cai)料(Liao),(?)并(Bing)且(Qie)在(Zai)热(Re)带(Dai)表(Biao)面(Mian)覆(Fu)着(Zhuo)一(Yi)很(Hen)薄(Bao)的(De)绝(Jue)缘(Yuan)层(Ceng)之(Zhi)后(Hou),(?)还(Huan)可(Ke)用(Yong)于(Yu)测(Ce)量(Liang)金(Jin)属(Shu)材(Cai)料(Liao),(?)适(Shi)用(Yong)范(Fan)围(Wei)较(Jiao)广(Guang),(?)而(?)且(Qie)实(Shi)验(Yan)装(Zhuang)置(Zhi)易(Yi)于(Yu)实(Shi)现(Xian)。(?)与(Yu)圆(Yuan)柱(Zhu)状(Zhuang)电(Dian)加(Jia)热(Re)体(Ti)相(Xiang)比(Bi),(?)薄(Bao)带(Dai)状(Zhuang)电(Dian)加(Jia)热(Re)体(Ti)与(Yu)被(Bei)测(Ce)固(Gu)体(Ti)材(Cai)料(Liao)有(You)更(Geng)好(Hao)的(De)接(Jie)触(Chu)状(Zhuang)态(Tai),(?)故(Gu)热(Re)带(Dai)法(Fa)比(Bi)热(Re)线(Xian)法(Fa)更(Geng)适(Shi)宜(Yi)于(Yu)测(Ce)量(Liang)固(Gu)体(Ti)材(Cai)料(Liao),(?)另(Ling)外(Wai)热(Re)带(Dai)比(Bi)细(Xi)的(De)热(Re)线(Xian)要(Yao)更(Geng)加(Jia)结(Jie)实(Shi)耐(Nai)用(Yong)一(Yi)些(Xie)。(?)热(Re)带(Dai)的(De)温(Wen)度(Du)变(Bian)化(Hua)可(Ke)以(Yi)通(Tong)过(Guo)测(Ce)量(Liang)热(Re)带(Dai)电(Dian)阻(Zu)的(De)变(Bian)化(Hua)来(Lai)获(Huo)得(De),(?)也(Ye)可(Ke)以(Yi)通(Tong)过(Guo)在(Zai)热(Re)带(Dai)表(Biao)面(Mian)上(Shang)焊(Han)接(Jie)热(Re)电(Dian)偶(Ou)来(Lai)直(Zhi)接(Jie)测(Ce)量(Liang)。(?)