乐彩网

NINHAO,HUANYINGFANGWENGUANGZHOUJINGXIUREGONGSHEBEIYOUXIANGONGSIGUANFANGWANGZHAN!

精秀热工设备

全国服务热线:
132-4733-3419

热门关键词: 密封检测装置NC860户外摄像头

当前位置: 主页 > 行业信息 > 高低温试验箱测试方法改进

高低温试验箱测试方法改进

来源:精秀热工 浏览: 发布日期:2018-12-05

摘要:某型无线电高度表在高低温试验中经常出现跟踪搜索不转换及灵敏度超差现象,根据该高度表工作原理,认真分析装后试验各环节,发现金属的高低温箱中耦合器处电磁波泄露是产生上述现象的原因,提出了转接器代替耦合器的改进测试方法,使试验得以顺利进行。


1、引言


MOUXINGWUXIANDIANGAODUBIAOZHUANGHOUANJISHUTIAOJIANYAOQIUJINXINGQUANXITONGGAO、DIWENSHIYAN,JIZAIGAODIWENSHIYANXIANGZHONGJINXINGGAODUBIAODEJINGDU、LINGMINDUJIQUANXITONGMONIFASHELIUCHENGDEJIANCHA。


PICHANPINSHIYANZHONGJINGCHANGCHUXIANSHIYANXIANGZHONGCHANGWENXIAWUXIANDIANGAODUBIAODELINGMINDUCHAOCHAJIGENZONGSOUSUOBUZHUANHUANXIANXIANG,ERXIANGTONGCHANPINZAIQICHUCHANGYANSHOUJIZHUANGQIANCESHIGEHUANJIEDECHANPINXINGNENGJIANCHAZHONGJUNHEGE。WEISHISHIYANSHUNLIJINXINGBINGXIANGYONGHUJIAOFUHEGEDECHANPIN,WOMENTONGGUOFENXIYUANYIN,TICHULEGAIJINCESHIFANGFADEJIEJUEFANGAN,JIANGOUHECESHIGAIWEIZHUANJIEQIZHIJIELIANJIECESHI,JINGDUOCISHIYANYANZHENG,JIEJUELESHANGSHUWENTI。


2、无线电高度表的测高原理及测试方法


FEIXINGQISHIYONGDEWUXIANDIANGAODUBIAOGONGZUOSHIXIANGDIMIANFASHEDIANCIBOBINGJIESHOUFANSHEHUIDEDIANCIBO,TONGGUOCELIANGDIANCIBOZOUGUOBEICEGAODUDESHIJIANLAICEGAO。


MOUXINGWUXIANDIANGAODUBIAOCAIYONGLIANXUBODIAOPINHENGDINGCHAPAITIZHI,QIGONGZUOYUANLIRUTU1SUOSHI。FASHEBOYONGJUCHIBODIAOZHI,JIESHOUBOZAISHIJIANZHOUSHANGYANCHI。


无线电高度表测高原理图

图1 无线电高度表测高原理


YOUXIANGSISANJIAOXING∆ABCYU∆ADEKEZHI:

计算公式

SHIZHONG:HYIBEICEGAODU;

c-GUANGSU;

∆F-DIAOZHIPINLVDAIKUAN;

TYIDIAOZHIPINLVZHOUQI;

fb一差拍频率。


GAIGAODUBIAOTONGGUOGAIBIANDIAOZHIZHOUQIT,SHICHAPAIPINLV HENGDINGWEIYICHANGSHU(YOUGENZONGSIFUHUILUSHIXIAN),ZHEIYANGGAODUDEBIANHUAYINQITDEBIANHUA,TONGGUODUITDECELIANG,KEDEDAOGAODUH。ANZHAOZHUANGHOUCESHIJISHUTIAOJIAN,XUCELIANGWUXIANDIANGAODUBIAOZHUANGJIHOUDELINGMINDUJIJINGDU,CESHIFANGFARUTU2SUOSHI。


无线电高度表测试方法(改进前)

图2 无线电高度表测试方法(改进前)


GAODUBIAOFASHEDEDIAOPINXINHAOYOUFASHETIANXIANTONGGUOOUHEQIJINRUWUXIANDIANGAODUBIAOMONIQI,JINGSHUAIJIANYANCHIMONICHUGAODUHOU,ZAITONGGUOOUHEQIJINRUGAODUBIAOJIESHOUTIANXIAN,TONGSHILIYONGZONGHECESHISHEBEIJIANCHAGAODUBIAOGONGZUOSHIGEXIANGXINGNENGZHIBIAO。


3、试验故障现象及原因分析


XIANXIANG1:GENZONGSOUSUOBUZHUANHUAN。ZAISHIYANZHONG,GAIBIANGAODUBIAOMONIQIDEGAODUDINGZHIYOU0mDAO20mSHI,CHUXIANGAODUBIAO20mGAODUGENZONGBUNENGZHUANHUANXIANXIANG,WUFAXIANSHIZHENGQUEGAODUZHI。


XIANXIANG2:JIESHOUJILINGMINDUCHAOCHA。ZAISHIYANZHONG,GAIBIANGAODUBIAOMONIQIDEGAODUSHEDINGZHIJISHUAIJIANZHISHI,GAODUBIAOJINRUGENZONG,DANZONGHECESHISHEBEICECHUGAODUBIAODEGENZONGLINGMINDUCHAOCHA。RUZAICE500mMONIGAODUSHI,SHIJICESHIZHICHAOCHA2dB。


LIANXUBOTIZHIDEGAODUBIAOWEILEKEFUCEGAOSHIDEDUOZHIXIANXIANG(RUTU3SUOSHI),SHEJIYOUDITONGLVBOQI,SHIGAODUBIAOJINSHUCHUCHUIZHIDIMIANDEGAODUXINHAOH。JINKENENGDILVCHUXIEJUH'SUODAILAIDEJIAOGAOPINLVXINHAO。

图3 低通滤波器工作原理示意图

图3 低通滤波器工作原理示意图


ZAIGAODIWENSHIYANXIANGZHONGSHIYANSHI,YOUYUOUHEQIYUTIANXIANJIANJIEHECHUBUKEBIMIANYOUFENGXI,FASHEXINHAOCONGFENGXICHUXIELU,ERSHIYANXIANGWEIJINSHUFENGBITI,XIELUDEXINHAOZAIXIANGTINEIJINGDUOCIFANSHEZHIJIEJINRUJIESHOUTIANXIAN,RUJINRUDEXINHAOQIANGDUZAIJIESHOUJILINGMINDUFANWEINEI,GAODUBIAOZEHUIZAIDITONGLVBOQIDEZUOYONGXIAZHIJIEGENLING。ERZAIXIANGWAIKAICHANGHUANJINGXIACESHISHI,XIELUDEXINHAOJIUHUIBEIHUANJINGXISHOU,YINGXIANGBUSHIHENMINGXIAN。


ZAIMOUXIECESHIZHONG,GAODUBIAOSUIRANGENZONGMONIQISHEDINGDEGAODUZHI,DANLINGMINDUCHAOCHA,ZHEIZHONGXIANXIANGKENENGSHIJINGUANXIELUDEXINHAOQIANGDUBUZUYIDAOZHIGAODUBIAOGENLING,DANDUIMONIQITONGGUOOUHEQIJINRUJIESHOUTIANXIANDEZHENGQUEXINHAOYOUGANRAO,DAOZHIJIESHOUJILINGMINDUJIANGDI。


LINGWAI,YOUYUZAIGAODIWENHUANJINGXIA,OUHEQIDEHETIZHONGCHANGYOUNINGJIESHUIDECUNZAI,HUIDUICESHIJIEGUODAILAIBULIYINGXIANG。


4、测试方法改进


ZONGSHANGSUOSHU,GAODUBIAOCESHIGUZHANGXIANXIANGSHIYOUYUOUHEQIYUCHANPINWAIXINGBUTIEHEZAOCHENGDE。GAODUBIAOZHUANGHOUSHIYANZHUYAOMUDESHIKAOHEQIZAIGAO、DIWENHUANJINGXIASHOUFAJIDELINGMINDU,BUKAOHESHOU、FATIANXIANDEFANGXIANGXING、ZHUBODENGXINGNENG。TIANXIANDECESHIXUYAOTESHUDESHEBEI,QIETIANXIANZUOWEIYIZHONGWUYUANQIJIAN,QIXINGNENGZAIGAO、DIWENHUANJINGXIADEBIANHUAKEYIHULVEBUJI。


YOUCI,WOMENTICHULEZHIJIELIANJIEDEGAIJINCESHIFANGFA。CAIYONGLIANGGEZHUANYONGZHUANJIEQI,RUTU4SUOSHI,JIANGQIYIDUANYUSHOUFATIANXIANDEKUIXIANXIANGLIAN,LINGYIDUANYUGAODUBIAOMONIQIXIANGLIAN,RUTU5SUOSHI。


图4 专用转接器示意图

图4 专用转接器示意图

图5 无线电高度表测试方法(改进后)

图5 无线电高度表测试方法(改进后)


WEILEMONITIANXIANKUIXIANDAOTIANXIANDEXINHAOSHUAIJIAN,ZAIZHUANJIEQIZHONGGECHUANRUYIZHISHUAIJIANQI。WOMENZAICHANGWEN、SHINEIHUANJINGXIALIYONGSHILIANGWANGLUOFENXIYIDUISHOUFATIANXIANOUHEFANGSHIDESHUAIJIANZHIJINXINGLECEDING,DUOCICEDINGDEDAOSHUAIJIANZHIYUEWEI9dB,YOUYUSHOUFATIANXIANXINGSHIXIANGTONG,TIANXIANKUIXIANZUKANGJIETOUYEDOUSHIYIYANGDE,YINCIJIANGGAISHUAIJIANZHIPINGJUNDAOLIANGGEZHUANJIEQIDESHUAIJIANQIZHONG,JUNWEI4.5dB。


转接器主要技术指标:


JIETOUXINGSHI:SMA/K-TNC/K

ZHUBOXISHU:<2dB

SHUAIJIAN:9dB±2dB(LIANGZHIZONGHE)

YANCHIGAODU:0.5m±0.3m(LIANGZHIZONGHE)

SHUAIQI:500HM 4.5dB


5、结语


CAIYONGSHANGSHUGAIJINDECESHIFANGFA,WOMENDUIPICHANPINJINXINGLEDUOCIGAODIWENZHUANGHOUSHIYAN,KEZHIGUANDIJIANCEWUXIANDIANGAODUBIAOJIESHOUJIZAIGAODIWENHUANJINGXIADEJINGDU、LINGMINDUDENGZHIBIAO,MANZULEYONGHUDESHIYONGYAOQIU。


高低温湿热试验箱效果图

由广州精秀热工设备有限公司生产制造的-高低温试验箱示意图


精秀热工试验设备推荐

  • 整车气密性试验台
    整车气密性试验台主要用于小风量试验、整车密封的(吹气,正压)试验 ...
  • 高低温测试仪
    高低温测试仪/高低温恒温恒湿试验箱是航空、汽车、家电、科研等领域必 ...

GUANGZHOUJINGXIUREGONGSHEBEIYOUXIANGONGSI @BANQUANSUOYOU   BEIANHAO: