[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fGplELLd9LR2W4URPBEHICX3mH76TGjCX1G6mu2hjAr0":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":14,"related":15,"source":26,"type":60},[],"2023-12-30 15:10:57",124448991,[8,9],"正确","错误",{"courseId":11,"courseImg":12,"courseName":13},"d0b0a625ba2f2ba150c9aadf7cc7ad10","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","传感器技术","超声波接收头接收超声波是利用超声波的逆压电效应",[16,28,37,46,55,61,66,69,74,79],{"answer":17,"createTime":18,"id":19,"options":20,"question":25,"source":26,"type":27},[],"2023-12-24 23:05:28",120972510,[21,22,23,24],"人体感应自动照明灯","一般电子秤","红外线探测电路","红外线气体分析仪","下列不属于红外传感器应用的是:( )","v1",0,{"answer":29,"createTime":18,"id":30,"options":31,"question":36,"source":26,"type":27},[],120972512,[32,33,34,35],"化学探测器","光子探测器","热探测器","生物探测器","热释电探测器在( )中探测率最高,频率响应最宽,所以这种探测器倍受重视,发展很快",{"answer":38,"createTime":18,"id":39,"options":40,"question":45,"source":26,"type":27},[],120972516,[41,42,43,44],"散射","反射","折射","透射","超声波具有良好的穿透性,在固体中可穿透几十米的长度,碰到杂质或分界面就会有显著的( )",{"answer":47,"createTime":18,"id":48,"options":49,"question":54,"source":26,"type":27},[],120972519,[50,51,52,53],"应变效应","电涡流效应","压电效应","逆压电效应","将超声波(机械振动波)转换成电信号是利用压电材料的:()",{"answer":56,"createTime":5,"id":57,"options":58,"question":59,"source":26,"type":60},[],124448979,[8,9],"热释电红外探测器由具有极化现象的热晶体或被称为"铁电体"的材料制成的",3,{"answer":62,"createTime":5,"id":63,"options":64,"question":65,"source":26,"type":60},[],124448986,[8,9],"热释电人体红外线传感器不受白天黑夜的影响,可昼夜不停地用于监测,广泛地用于防盗报警",{"answer":67,"createTime":5,"id":6,"options":68,"question":14,"source":26,"type":60},[],[8,9],{"answer":70,"createTime":5,"id":71,"options":72,"question":73,"source":26,"type":60},[],124448993,[8,9],"在超声波的作用下,生物组织将受到压力的作用,并产生速度和加速度方面的变化",{"answer":75,"createTime":5,"id":76,"options":77,"question":78,"source":26,"type":60},[],124448997,[8,9],"由于经超声波接收头变换后的交流电信号非常弱,因此必须经放大电路放大",{"answer":80,"createTime":5,"id":81,"options":82,"question":83,"source":26,"type":60},[],124448998,[8,9],"超声波传感器的灵敏度主要取决于制造晶片本身.机电耦合系数大,灵敏度高;反之,灵敏度低"]