光(guang)纤光(guang)栅混(hun)凝(ning)土表(biao)面标(biao)准型应(ying)变计(ji)主要(yao)用(yong)(yong)(yong)于混(hun)凝(ning)土表(biao)面的(de)应(ying)力应(ying)变监测(ce)(ce)，也用(yong)(yong)(yong)于对各(ge)种金属(shu)或(huo)其(qi)他固(gu)体(ti)结(jie)(jie)构(gou)表(biao)面进(jin)行(xing)静(jing)态(tai)和动态(tai)应(ying)力应(ying)变监测(ce)(ce)。产(chan)品采用(yong)(yong)(yong)特有(you)(you)的(de)弹性(xing)(xing)梁结(jie)(jie)构(gou)，具有(you)(you)较高的(de)测(ce)(ce)量(liang)分辨率和测(ce)(ce)量(liang)。现场安装(zhuang)时先在(zai)(zai)混(hun)凝(ning)土表(biao)面打(da)四个钻孔，然后(hou)采用(yong)(yong)(yong)紧固(gu)螺钉将底座固(gu)定(ding)在(zai)(zai)混(hun)凝(ning)土表(biao)面，通过(guo)(guo)螺母将传(chuan)感(gan)器(qi)方便地(di)固(gu)定(ding)在(zai)(zai)底座上，亦可(ke)通过(guo)(guo)焊接或(huo)粘贴方式将传(chuan)感(gan)器(qi)固(gu)定(ding)在(zai)(zai)结(jie)(jie)构(gou)表(biao)面。产(chan)品符合国(guo)家建筑(zhu)工业行(xing)业标(biao)准JG/T422-2013。产(chan)品特点，安装(zhuang)方便，既可(ke)进(jin)行(xing)监测(ce)(ce)，又(you)可(ke)在(zai)(zai)短(duan)期监测(ce)(ce)，能重(zhong)复使用(yong)(yong)(yong)；适用(yong)(yong)(yong)于环境温度变化小的(de)工程，占用(yong)(yong)(yong)波长(zhang)带宽资源少，批量(liang)实用(yong)(yong)(yong)性(xing)(xing)高，节省项目整体(ti)成本；尾纤采用(yong)(yong)(yong)PU披覆铠装(zhuang)光(guang)缆，具有(you)(you)优异的(de)耐温性(xing)(xing)能和耐腐(fu)蚀(shi)、耐老化性(xing)(xing)能，适应(ying)野外存(cun)活环境；稳定(ding)性(xing)(xing)好、可(ke)靠性(xing)(xing)高。埋入(ru)式振弦(xian)应(ying)变计(ji)集成有(you)(you)温度传(chuan)感(gan)器(qi)。长(zhang)春(chun)振弦(xian)式土压力应(ying)变计(ji)哪家好

振(zhen)弦式(shi)(shi)应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)使(shi)用(yong)(yong)(yong)指南：1.测(ce)量(liang)(liang)，测(ce)量(liang)(liang)振(zhen)弦式(shi)(shi)应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)先将(jiang)测(ce)量(liang)(liang)线连接振(zhen)弦读数仪(yi)(yi)，将(jiang)各(ge)色夹子对(dui)(dui)应(ying)(ying)(ying)连接上应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)的(de)输出电(dian)(dian)(dian)缆，黑、红测(ce)频率(lv)，白(bai)、绿(lv)测(ce)温度(du)。振(zhen)弦式(shi)(shi)应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)内(nei)附(fu)有智能(neng)识别(bie)芯(xin)(xin)(xin)片，其内(nei)存(cun)贮有该(gai)应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)的(de)编号、系数K、温度(du)修正系数b等(deng)信息。用(yong)(yong)(yong)读数仪(yi)(yi)测(ce)量(liang)(liang)时会自动将(jiang)识别(bie)信息读出，顺序(xu)存(cun)入读数仪(yi)(yi)内(nei)，通(tong)讯给计(ji)算机，方(fang)便快速统计(ji)计(ji)算及(ji)查询(xun)，使(shi)测(ce)量(liang)(liang)实(shi)现人(ren)工智能(neng)无(wu)纸化操作。工程现场多(duo)支应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)电(dian)(dian)(dian)缆被(bei)意外挖(wa)断，用(yong)(yong)(yong)读数仪(yi)(yi)测(ce)量(liang)(liang)一遍，自动识别(bie)出每支应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)所对(dui)(dui)应(ying)(ying)(ying)的(de)编号及(ji)身份信息。2.应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)故(gu)障排查，当振(zhen)弦式(shi)(shi)应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)测(ce)量(liang)(liang)出现故(gu)障时，可用(yong)(yong)(yong)万用(yong)(yong)(yong)表检查应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)芯(xin)(xin)(xin)线间的(de)电(dian)(dian)(dian)阻值(zhi)(zhi)，其正常状况红、黑芯(xin)(xin)(xin)线电(dian)(dian)(dian)阻值(zhi)(zhi)通(tong)常为(wei)300Ω左右(you)(you)；绿(lv)、白(bai)芯(xin)(xin)(xin)线电(dian)(dian)(dian)阻值(zhi)(zhi)在(zai)温度(du)25℃时应(ying)(ying)(ying)为(wei)3kΩ左右(you)(you)；红、黑线对(dui)(dui)绿(lv)、白(bai)线或对(dui)(dui)屏蔽线(裸线)间绝(jue)缘(yuan)电(dian)(dian)(dian)阻值(zhi)(zhi)应(ying)(ying)(ying)﹥50MΩ(测(ce)量(liang)(liang)绝(jue)缘(yuan)电(dian)(dian)(dian)阻时可使(shi)用(yong)(yong)(yong)100V直流(liu)兆欧表，万用(yong)(yong)(yong)表测(ce)量(liang)(liang)绝(jue)缘(yuan)电(dian)(dian)(dian)阻应(ying)(ying)(ying)用(yong)(yong)(yong)MΩ档，其值(zhi)(zhi)应(ying)(ying)(ying)为(wei)无(wu)穷大∞)。天津振(zhen)弦式(shi)(shi)埋入式(shi)(shi)应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)好不好表贴式(shi)(shi)应(ying)(ying)(ying)变(bian)(bian)(bian)(bian)计(ji)为(wei)振(zhen)弦式(shi)(shi)弹(dan)性梁结构，适用(yong)(yong)(yong)于焊接到(dao)各(ge)种钢结构的(de)场合(he)。

常用的电阻应变计：1、短接式应变计，短接式应变计也有纸基和胶基等种类。短接式应变计由于在横向用粗铜导线短接，因而横向效应系数很小(<0.1%)，这是短接式应变计的较大优点。另外，在制造过程中敏感栅的形状较易保证，故测量精度高。但由于它的焊点多，焊点处截面变化剧烈，因而这种应变计疲劳寿命短。2、金属箔式应变计，箔式应变计的敏感栅是用厚度为0.002～0.005毫米的铜镍合金或镍铬合金的金属箔，采用刻图、制版、光刻及腐蚀等工艺过程而制成。基底是在箔的另一面涂上树脂胶，经过加温聚合而成，基底的厚度一般为0.03～0.05mm。

振弦式(shi)应(ying)变(bian)(bian)(bian)(bian)(bian)计(ji)(ji)(ji)(ji)可测量(liang)钢或混(hun)(hun)凝(ning)土(tu)结(jie)(jie)构(gou)的(de)(de)(de)应(ying)变(bian)(bian)(bian)(bian)(bian)，测量(liang)值用(yong)(yong)(yong)于(yu)计(ji)(ji)(ji)(ji)算结(jie)(jie)构(gou)荷载或应(ying)力(li)。应(ying)变(bian)(bian)(bian)(bian)(bian)计(ji)(ji)(ji)(ji)可通过电(dian)弧焊接端块固(gu)(gu)定在(zai)(zai)钢结(jie)(jie)构(gou)上，在(zai)(zai)混(hun)(hun)凝(ning)土(tu)表面，则可以(yi)(yi)通过安(an)装块（包括钢筋螺栓）安(an)装。埋入式(shi)应(ying)变(bian)(bian)(bian)(bian)(bian)计(ji)(ji)(ji)(ji)浇铸在(zai)(zai)混(hun)(hun)凝(ning)土(tu)结(jie)(jie)构(gou)中，也可作(zuo)为(wei)“喷浆混(hun)(hun)凝(ning)土(tu)”模型，带有可调(diao)的(de)(de)(de)张(zhang)(zhang)(zhang)紧环。对(dui)于(yu)混(hun)(hun)凝(ning)土(tu)的(de)(de)(de)高压力(li)，例如(ru)在(zai)(zai)深桩(zhuang)中，建议(yi)使用(yong)(yong)(yong)埋入式(shi)应(ying)变(bian)(bian)(bian)(bian)(bian)计(ji)(ji)(ji)(ji)进(jin)行深部(bu)应(ying)用(yong)(yong)(yong)。工作(zuo)原理，张(zhang)(zhang)(zhang)紧的(de)(de)(de)钢弦在(zai)(zai)拉动(dong)时会(hui)以(yi)(yi)其共振频(pin)率(lv)(lv)振动(dong)，这个(ge)频(pin)率(lv)(lv)的(de)(de)(de)平方与钢弦的(de)(de)(de)应(ying)变(bian)(bian)(bian)(bian)(bian)成正比。为(wei)了利用(yong)(yong)(yong)这一原理，振弦式(shi)应(ying)变(bian)(bian)(bian)(bian)(bian)计(ji)(ji)(ji)(ji)被设计(ji)(ji)(ji)(ji)为(wei)在(zai)(zai)固(gu)(gu)定结(jie)(jie)构(gou)上的(de)(de)(de)两个(ge)端块之间保(bao)持钢弦的(de)(de)(de)张(zhang)(zhang)(zhang)力(li)，一个(ge)电(dian)磁线(xian)圈组(zu)件被用(yong)(yong)(yong)来(lai)激(ji)励钢弦，然(ran)后(hou)将频(pin)率(lv)(lv)信号返回给读数单元。结(jie)(jie)构(gou)的(de)(de)(de)变(bian)(bian)(bian)(bian)(bian)形会(hui)改(gai)变(bian)(bian)(bian)(bian)(bian)两个(ge)端块之间的(de)(de)(de)距离，从而改(gai)变(bian)(bian)(bian)(bian)(bian)钢弦的(de)(de)(de)张(zhang)(zhang)(zhang)力(li)及其共振频(pin)率(lv)(lv)。返回的(de)(de)(de)信号转(zhuan)换为(wei)微应(ying)变(bian)(bian)(bian)(bian)(bian)单位(wei)(wei)。而应(ying)变(bian)(bian)(bian)(bian)(bian)计(ji)(ji)(ji)(ji)可在(zai)(zai)距其位(wei)(wei)置(zhi)1000米的(de)(de)(de)范围(wei)内(nei)进(jin)行数据(ju)读取(qu)。应(ying)变(bian)(bian)(bian)(bian)(bian)计(ji)(ji)(ji)(ji)具(ju)有内(nei)置(zhi)的(de)(de)(de)热(re)敏(min)电(dian)阻，可在(zai)(zai)必要时提供温度数据(ju)以(yi)(yi)检(jian)测热(re)效应(ying)。应(ying)变(bian)(bian)(bian)(bian)(bian)计(ji)(ji)(ji)(ji)的(de)(de)(de)安(an)装均(jun)应(ying)保(bao)持与支撑轴线(xian)平行。

金属电阻(zu)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)还可(ke)以按敏(min)感(gan)(gan)栅(zha)(zha)(zha)的(de)结构(gou)形状(zhuang)分为下述几(ji)类：(1)单(dan)轴(zhou)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)：单(dan)轴(zhou)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)一(yi)般是指(zhi)具有(you)一(yi)个(ge)敏(min)感(gan)(gan)栅(zha)(zha)(zha)的(de)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)。这种(zhong)(zhong)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)可(ke)用(yong)(yong)来测量单(dan)向应(ying)(ying)变(bian)(bian)(bian)。(2)单(dan)轴(zhou)多栅(zha)(zha)(zha)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)：把(ba)几(ji)个(ge)单(dan)轴(zhou)敏(min)感(gan)(gan)栅(zha)(zha)(zha)粘贴在同一(yi)个(ge)基底上，可(ke)构(gou)成平(ping)行轴(zhou)多栅(zha)(zha)(zha)和同轴(zhou)多栅(zha)(zha)(zha)，这种(zhong)(zhong)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)可(ke)方便(bian)(bian)地(di)测量构(gou)件表面(mian)的(de)应(ying)(ying)变(bian)(bian)(bian)梯度。(3)应(ying)(ying)变(bian)(bian)(bian)花(hua)(hua)(hua)(多轴(zhou)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji))：具有(you)两(liang)个(ge)或两(liang)个(ge)以上轴(zhou)线相交成一(yi)定角度的(de)敏(min)感(gan)(gan)栅(zha)(zha)(zha)制成的(de)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)称为多轴(zhou)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)，也称为应(ying)(ying)变(bian)(bian)(bian)花(hua)(hua)(hua)其敏(min)感(gan)(gan)栅(zha)(zha)(zha)可(ke)由金属丝或金属箔制成。采用(yong)(yong)应(ying)(ying)变(bian)(bian)(bian)花(hua)(hua)(hua)可(ke)方便(bian)(bian)地(di)测定平(ping)面(mian)应(ying)(ying)变(bian)(bian)(bian)状(zhuang)态下构(gou)件上某一(yi)点处(chu)的(de)应(ying)(ying)变(bian)(bian)(bian)。应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)在使用(yong)(yong)前(qian)，要用(yong)(yong)脱脂(zhi)棉浸(jin)无(wu)水(shui)乙醇擦洗，注意(yi)两(liang)面(mian)都(dou)要清(qing)洗。长春振弦(xian)式土压(ya)力(li)应(ying)(ying)变(bian)(bian)(bian)计(ji)(ji)哪家好

为保证应(ying)(ying)变(bian)计(ji)粘贴位(wei)置的(de)准(zhun)确，可(ke)用无油圆珠笔芯或划针(zhen)在贴片部(bu)位(wei)轻(qing)轻(qing)划出定(ding)位(wei)线。长春(chun)振弦式土压力应(ying)(ying)变(bian)计(ji)哪家好(hao)

双(shuang)层(ceng)应(ying)(ying)变(bian)计(ji)(ji)，在(zai)(zai)进(jin)(jin)行薄(bo)壳(qiao)、薄(bo)板(ban)应(ying)(ying)变(bian)的(de)测(ce)量(liang)时，需要在(zai)(zai)壳(qiao)和(he)板(ban)的(de)内、外(wai)(wai)表(biao)(biao)面对称贴(tie)片(pian)。而对于体(ti)积小或(huo)密(mi)封的(de)结构在(zai)(zai)内表(biao)(biao)面贴(tie)片(pian)几乎是无法进(jin)(jin)行的(de)，双(shuang)层(ceng)应(ying)(ying)变(bian)计(ji)(ji)为(wei)解决这(zhei)些问题提供(gong)了条件(jian)。在(zai)(zai)不太厚的(de)塑(su)(su)料(liao)上(shang)、下(xia)(xia)(xia)表(biao)(biao)面粘(zhan)贴(tie)应(ying)(ying)变(bian)计(ji)(ji)，并在(zai)(zai)应(ying)(ying)变(bian)计(ji)(ji)表(biao)(biao)面涂环氧(yang)(yang)树(shu)脂保护(hu)层(ceng)。使用(yong)时将此双(shuang)层(ceng)应(ying)(ying)变(bian)计(ji)(ji)粘(zhan)贴(tie)在(zai)(zai)被(bei)测(ce)构件(jian)的(de)外(wai)(wai)表(biao)(biao)面，利用(yong)弯(wan)(wan)曲应(ying)(ying)变(bian)线性分布(bu)及轴(zhou)(zhou)向应(ying)(ying)变(bian)均匀分布(bu)特(te)点，同时测(ce)出(chu)弯(wan)(wan)曲及轴(zhou)(zhou)向应(ying)(ying)变(bian)。防水(shui)(shui)应(ying)(ying)变(bian)计(ji)(ji)，在(zai)(zai)潮湿环境(jing)或(huo)水(shui)(shui)下(xia)(xia)(xia)，特(te)别在(zai)(zai)高水(shui)(shui)压作用(yong)下(xia)(xia)(xia)，应(ying)(ying)采用(yong)防水(shui)(shui)应(ying)(ying)变(bian)计(ji)(ji)。常(chang)温短期水(shui)(shui)下(xia)(xia)(xia)应(ying)(ying)变(bian)量(liang)测(ce)可在(zai)(zai)箔(bo)式应(ying)(ying)变(bian)计(ji)(ji)表(biao)(biao)面涂防护(hu)层(ceng)(如(ru)水(shui)(shui)下(xia)(xia)(xia)环氧(yang)(yang)树(shu)脂)。长(zhang)(zhang)期量(liang)测(ce)可用(yong)热塑(su)(su)方法将应(ying)(ying)变(bian)计(ji)(ji)夹在(zai)(zai)两块薄(bo)塑(su)(su)料(liao)板(ban)中(zhong)间，或(huo)采用(yong)防水(shui)(shui)、防霉(mei)、防腐蚀(shi)的(de)特(te)种胶(jiao)材料(liao)作为(wei)应(ying)(ying)变(bian)计(ji)(ji)的(de)基底和(he)覆(fu)盖层(ceng)制(zhi)成防水(shui)(shui)应(ying)(ying)变(bian)计(ji)(ji)。长(zhang)(zhang)春振弦式土压力应(ying)(ying)变(bian)计(ji)(ji)哪家(jia)好

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