神秘的红外警报器

一次到基层派出所办事,碰到了民警小张,小张跟我诉说最近很烦恼的一件事情

天津五大道里的某处别墅,住着一个显赫的人物,因为此人很厉害,住宅也是个独立的大院子,所以需要重点保护,院子的高大围墙上装了红外报警探头,红外报警器是一对探头安装在墙的两端,有效距离在20米左右,院子圈起来的高墙上面都依次放上这种红外报警探头,整个把院子围起来.

每个红外报警器分为发射端和接受端两个部分,如果两个两个探头对脸调试好,一个探头发射红外线,一个探头接受红外线,形成了两道无形的红外线保护,如果有物体从两束红外线穿越,或有阻挡,红外报警器就会自动报警,这是防备小偷的装置.

这个住宅围墙就安装了这种红外报警器.
可是最近出了奇怪的事情,报警器一到半夜1点左右就报警,可是门口警卫出来查看,四周围着走一圈,却发现没有什么人影,当然也怀疑是不是有树支被风吹,阻挡了红外线,白天仔细看,也没有树支能够阻挡红外线束,一连折腾了好几天,也查不出原因来,住宅似乎也没什么损失,没有外人进来过的情况.

厂家也被从外地喊来了,重新检修了一遍,也证明报警器良好,当地的派所民警压力很大,小张愁眉苦脸的和我说这事情.
我笑着对他说,你去找交警队借个拍摄违章的摄相头啊,要个带夜光的.
装旁边树上看看什么情况.

小张一拍脑袋,赶紧去找湖北路上的交警大楼,这个住宅人物得罪不起,交警领导亲自带着技术员,给住宅周围大树上装了几个摄像.
过了几天晚上报警器又响了,警卫赶紧把摄像头拍下的图象打开看看什么东西,图象调出来一看,墙头一个白影一闪而过,画面不是很清晰,因为是低桢拍摄,不是很连贯,但似乎发现出点什么,再后来,驻地武警部队,派来了10来个战士,穿着便衣,一连在院子外面溜达几天,某天一个便衣报告,晚上一个大树上爬了一只大白猫,事情豁然开朗,全体人员都舒了口气,此事上报给该领导,最后撤走了便衣,恢复了平静.

Introduce:Handle affairs to basic level police station, came up against policeman Xiaozhang, xiaozhang recounts Tianjin of very vexed recently a thing with me the somewhere in 5 highways is villatic, living a celebrated figure, because this person is very fierce, the residence also is an independent big courtyard, need to be protected mainly so, the lofty enclosure of the courtyard made up head of infra-red newspaper police officer, infra-red warning apparatus is the two end of installation of a pair of probe in the wall, effective distance is controlled in 20 meters, above the high fence that courtyard circle rises ordinal put head of police officer of this kind of infra-red newspaper, rectify inclose of courtyard of one or two.
Every infra-red warning apparatus is divided carry two shares to blast off to carry and be accepted, if two two probe had been debugged to the face, a probe fires infrared ray, a probe accepts infrared ray, formed two aeriform infrared ray protection, if the object passes through from two bundles of infrared ray, or have hold back, infra-red warning apparatus can call the police automatically, this is to guard against the device of thief.
This residence enclosure installed this kind of infra-red warning apparatus.
But gave strange thing recently, warning apparatus was controlled at 1 o'clock to midnight call the police, but doorway guard comes out to examine, surround all around wear circuit, discover however without what people, also suspecting of course is to the tree is raised be blown by wind, stopped infrared ray, look carefully by day, also raise without the tree can hold back infra-red wiring harness, in succession do sth over and over again several days, also do not check give a reason to come, the residence appears also loss of it doesn't matter, without the circumstance that alien has come in.
Manufacturer also by cry from the other place came, overhauled afresh, also prove warning apparatus is good, pressure of the policeman that send place is very great, xiaozhang is woebegone say this thing with me.
I am laughing to say to him, you go looking for policeman team to borrow film of violate the rules and regulations photograph photograph head, want a zone luminous.
On the side of outfit what condition treats on the tree.
Small Zhang Yi taps a head, go looking for the policeman building on Hubei road rapidly, this residence character is displeased do not rise, policeman leader is bringing technician personally, to large tree made up a few are photographed all round the residence picture.
Passed a few days warning apparatus rang again in the evening, guard hurries photograph the picture that takes like the head to open see what thing, image v will look, a Bai Ying shows the top of a wall and pass, the picture is not very clear, because be low hardwood film, not be very coherent, but discover it seems that what to give, again later, army of armed police of place where troops are stationed, the group came 10 come a soldier, wearing civilian clothes, in succession is outside the courtyard go for a walk a few days, one of these day report of a civilian clothes, one climbed cat of a become known on the tree greatly in the evening, its be suddenly enlightened, crew Dou Shu tone, this matter reports this leader, mogged finally civilian clothes, restored calm.
5226