https://newappaz.oss-accelerate.aliyuncs.com/wherein_images/post/20210917/93ef07c911a94c7a80a96e800f375ab3.jpg https://newappaz.oss-accelerate.aliyuncs.com/wherein_images/post/20210917/1bfa1b8f99da4013a60179145a36701e.jpg https://newappaz.oss-accelerate.aliyuncs.com/wherein_images/post/20210917/579e91f0b0284b288a216d0409cdfb54.jpg https://newappaz.oss-accelerate.aliyuncs.com/wherein_images/post/20210917/e0ff127b4f2547aabd7c1e1f48367018.jpg 接近开关 最近项目上是有关于接近开关的,所以顺便了解了一下,没想到种类还真多。 最简单的是二线制的接近开关,其实就相当于一个开关了。但是其实它有规定的接线顺序。所以需要注意。其次需要注意的是它的检测方式,有电感式(探测金属),电容式(物体,不限于金属),霍尔式(磁性物体)等。一般二线式常用电感式,检测距离4mm,负载电流为100mA~400mA,分为交流与直流类型,同时又分为常开与常闭类型。安装方式分为齐平与非齐平,埋入式与非埋入式。同时还要注意供电范围,直流供电根据不同的产品有不同的供电范围,交流类型可以选择220VAC供电,但负载电流最大也是400mA而已。当然,还存在其它规格的二线类型接近开关。 三线制的接近开关分为NPN型和PNP型。NPN型的接近开关需要将信号线通过负载接到电源上。PNP则是连到电源地上。三线制的有可能会在常开或常闭的基础上增加一个常闭或常开的触点。三线制接近开关一般都是直流的。也存在NPN与PNP共存的接近开关。 还有一种是模拟量接近开关传感器,其实又叫线性位移传感器。其实是根据不同的接近距离输出不同的电压,一般是0~10V。 其实,关于接近开关,除了上面那些,还有一些其它的参数。比如绝缘电阻,接近开关由高电平变为低电平或由低电平变为高电平的时间,静态功耗,远离特性和接近特性,负载短路保护特性等等。 总而言之,使用时注意查阅器件特性及手册。其实大多数是产生驱动LED,继电器或PLC的数字量。 [WhereIn Android] (http://www.wherein.io)
post_id | 94,075,966 |
---|---|
author | lucienyong |
permlink | wherein-1631856030519-s |
category | hive-193186 |
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created | 2021-09-17 05:20:33 |
last_update | 2021-09-17 05:20:33 |
depth | 0 |
children | 5 |
net_rshares | 255,508,929,570 |
last_payout | 2021-09-24 05:20:33 |
cashout_time | 1969-12-31 23:59:59 |
total_payout_value | 0.054 SBD |
curator_payout_value | 0.033 SBD |
pending_payout_value | 0.000 SBD |
promoted | 0.000 SBD |
body_length | 1,118 |
author_reputation | 16,052,975,968,694 |
root_title | 接近开关 |
beneficiaries | [] |
max_accepted_payout | 1,000,000.000 SBD |
percent_steem_dollars | 10,000 |
author_curate_reward | "" |
voter | weight | wgt% | rshares | pct | time |
---|---|---|---|---|---|
cnfund | 0 | 209,447,406 | 4.15% | ||
nuagnorab | 0 | 11,330,291,042 | 4.15% | ||
aaronli | 0 | 5,131,449,399 | 4.15% | ||
shenchensucc | 0 | 4,643,523,095 | 4.15% | ||
susanli3769 | 0 | 5,485,515,541 | 4.15% | ||
davidmendel | 0 | 1,096,007,487 | 4.15% | ||
pixelfan | 0 | 25,103,333,463 | 4% | ||
everrich | 0 | 262,120,148 | 4.15% | ||
syh7758520 | 0 | 318,287,669 | 4.15% | ||
tvb | 0 | 2,910,238,744 | 4.15% | ||
liumei | 0 | 235,939,617 | 4.15% | ||
minloulou | 0 | 153,237,514 | 4.15% | ||
sunray | 0 | 374,964,171 | 4.15% | ||
winniex | 0 | 187,468,810 | 4.15% | ||
qifenggan | 0 | 239,333,697 | 4.15% | ||
windowglass | 0 | 32,478,240,311 | 4.15% | ||
iamafra | 0 | 2,531,292,735 | 4.15% | ||
angelina6688 | 0 | 2,376,685,613 | 4.15% | ||
auleo | 0 | 678,769,751 | 4.15% | ||
cheva | 0 | 12,842,711,515 | 4.15% | ||
maiyude | 0 | 11,428,570,747 | 4.15% | ||
wilhb81 | 0 | 19,965,653,488 | 4.15% | ||
youandme | 0 | 592,774,076 | 4.15% | ||
kirato | 0 | 102,563,882 | 4.15% | ||
cherryng | 0 | 233,800,860 | 4.15% | ||
nostalgic1212 | 0 | 2,887,099,983 | 4.15% | ||
also.einstein | 0 | 432,704,588 | 4.15% | ||
ericet | 0 | 1,089,475,831 | 4.15% | ||
onepercentbetter | 0 | 1,691,419,867 | 4.15% | ||
aellly | 0 | 615,613,755 | 4.15% | ||
huangzuomin | 0 | 580,911,044 | 4.15% | ||
janicechua | 0 | 1,334,835,779 | 4.15% | ||
andrewma | 0 | 1,406,512,094 | 4.15% | ||
softmetal | 0 | 739,465,988 | 4.15% | ||
liuzg | 0 | 7,913,326,722 | 4.15% | ||
tanlikming | 0 | 62,678,491 | 4.15% | ||
honoru | 0 | 2,343,893,260 | 4.15% | ||
hmayak | 0 | 79,048,558 | 4.15% | ||
robertyan | 0 | 26,787,355 | 4.15% | ||
abcallen | 0 | 3,667,401,454 | 4.15% | ||
sunai | 0 | 3,891,289,894 | 4.15% | ||
robin.han | 0 | 191,234,609 | 4.15% | ||
julian2013 | 0 | 3,752,465,419 | 4.15% | ||
edwardchan | 0 | 57,658,961 | 4.15% | ||
raynopssgold | 0 | 93,303,574 | 4.15% | ||
slientstorm | 0 | 185,470,200 | 4.15% | ||
pet.society | 0 | 7,531,242,408 | 4.15% | ||
annepink | 0 | 3,198,902,042 | 4.15% | ||
cherryzz | 0 | 1,561,476,139 | 4.15% | ||
buo | 0 | 517,312,191 | 4.15% | ||
yunki | 0 | 533,354,529 | 4.15% | ||
cloudblade | 0 | 4,037,194,269 | 4.15% | ||
kelvinzhang | 0 | 231,078,495 | 4.15% | ||
honey00 | 0 | 364,261,876 | 4.15% | ||
morningshine | 0 | 5,036,483,021 | 4.15% | ||
cn-activity | 0 | 104,574,146 | 4.15% | ||
cnlonglive | 0 | 1,274,946,481 | 4.15% | ||
berrydeng | 0 | 379,431,318 | 4.15% | ||
davidchen | 0 | 3,113,669,255 | 4.15% | ||
teamcn-fund | 0 | 2,925,345 | 4.15% | ||
cecilian | 0 | 529,230,523 | 4.15% | ||
good2believe | 0 | 257,053,559 | 4.15% | ||
devyleona | 0 | 163,106,762 | 4.15% | ||
happygoluckynow | 0 | 98,671,144 | 4.15% | ||
mayiloveyou | 0 | 92,940,269 | 4.15% | ||
goodsimplelife | 0 | 92,745,893 | 4.15% | ||
yanhan | 0 | 3,786,508,164 | 4.15% | ||
walker886 | 0 | 0 | 4.15% | ||
zhongyefu | 0 | 145,371,658 | 4.15% | ||
m15197972567 | 0 | 182,200,646 | 4.15% | ||
kgame | 0 | 104,422,296 | 4.15% | ||
hertz300 | 0 | 1,146,591,528 | 4.15% | ||
delta-clan | 0 | 33,005,904 | 4.15% | ||
steem-drivers | 0 | 623,659,118 | 4.15% | ||
cn-zzang | 0 | 8,417,736 | 4.15% | ||
cn-sct | 0 | 0 | 4.15% | ||
xiaoq.sports | 0 | 558,424,156 | 4.15% | ||
cn-marlians | 0 | 67,741,822 | 4.15% | ||
hykwf678233 | 0 | 4,265,629,041 | 4.15% | ||
boylikegirl | 0 | 2,067,866,475 | 24% | ||
gillianlien | 0 | 675,833,964 | 4.15% | ||
stevewu | 0 | 0 | 4.15% | ||
yanchen | 0 | 243,456,837 | 4.15% | ||
vickyli | 0 | 239,256,003 | 4.15% | ||
annzhao | 0 | 0 | 4.15% | ||
cn-trail | 0 | 601,550,005 | 4.15% | ||
lnakuma | 0 | 608,834,649 | 4.15% | ||
jennyliao | 0 | 5,506,187,704 | 76% | ||
bo022 | 0 | 179,817,581 | 4.15% | ||
gillianlienmap | 0 | 131,007,704 | 4.15% | ||
lovequeen | 0 | 10,230,825,261 | 4.15% | ||
familyonline-tv | 0 | 3,004,854,943 | 4.15% | ||
bo022022 | 0 | 171,012,272 | 4.15% | ||
littleksroad | 0 | 0 | 4.15% | ||
evahe | 0 | 6,054,845,059 | 100% | ||
dryuen | 0 | 1,273,698,739 | 4.15% | ||
sweetime | 0 | 0 | 4.15% | ||
capehorn | 0 | 0 | 4.15% | ||
choseal-leo | 0 | 708,958,091 | 4.15% | ||
tenki | 0 | 274,337,200 | 4.15% | ||
lucienyong | 0 | 481,351,772 | 4.15% | ||
iris08 | 0 | 778,767,265 | 4.15% | ||
yuyusong | 0 | 783,933,470 | 4.15% | ||
laplanss2020 | 0 | 227,793,993 | 4.15% | ||
xiaohuangniu | 0 | 197,425,991 | 4.15% | ||
caimao317 | 0 | 129,102,893 | 4.15% | ||
zete | 0 | 288,756,539 | 4.15% | ||
leungyi | 0 | 212,991,595 | 4.15% | ||
abundancelife | 0 | 124,338,085 | 4.15% | ||
ericaliu | 0 | 277,108,423 | 4.15% | ||
yikoutian | 0 | 90,203,796 | 4.15% | ||
little-yellow | 0 | 124,875,225 | 4.15% | ||
b1-3 | 0 | 80,400,650 | 4.15% | ||
cittriy | 0 | 213,559,389 | 4.15% | ||
wo5 | 0 | 601,420,082 | 4.15% | ||
rh22 | 0 | 505,746,162 | 4.15% | ||
kaylaway | 0 | 103,108,062 | 4.15% | ||
talalala | 0 | 127,388,462 | 4.15% | ||
haoeeicc | 0 | 168,952,482 | 4.15% | ||
gougou-god | 0 | 296,390,021 | 4.15% | ||
w711jy | 0 | 154,726,012 | 4.15% | ||
tt0215 | 0 | 98,263,232 | 4.15% | ||
zyf321 | 0 | 0 | 4.15% | ||
zxxac | 0 | 1,326,127,703 | 99% | ||
luna9413 | 0 | 0 | 4.15% | ||
iloveher413 | 0 | 0 | 4.15% | ||
moringtree | 0 | 114,327,753 | 4.15% | ||
jennychen | 0 | 72,191,907 | 4.15% | ||
circlebubble | 0 | 920,410,812 | 4.15% | ||
shery820 | 0 | 0 | 4.15% | ||
princesstai | 0 | 0 | 4.15% | ||
wanlichalu | 0 | 0 | 4.15% | ||
wow123 | 0 | 0 | 4.15% | ||
dreamstar | 0 | 0 | 4.15% | ||
xiefei | 0 | 0 | 4.15% | ||
diochen | 0 | 0 | 4.15% | ||
zhouxiaodong | 0 | 0 | 4.15% | ||
skyheaven | 0 | 0 | 4.15% | ||
zhongnanxiaoyu | 0 | 189,630,696 | 4.15% | ||
paintmage | 0 | 122,074,235 | 4.15% | ||
everlandd | 0 | 532,447,962 | 4.15% | ||
wuyeyangguang-1 | 0 | 103,869,992 | 4.15% | ||
legendao | 0 | 91,512,481 | 4.15% |
👍🏻!shop [WhereIn Android] (http://www.wherein.io)
post_id | 94,080,154 |
---|---|
author | boylikegirl |
permlink | wherein-1631875139167 |
category | hive-193186 |
json_metadata | {} |
created | 2021-09-17 10:39:00 |
last_update | 2021-09-17 10:39:00 |
depth | 1 |
children | 1 |
net_rshares | 0 |
last_payout | 2021-09-24 10:39:00 |
cashout_time | 1969-12-31 23:59:59 |
total_payout_value | 0.000 SBD |
curator_payout_value | 0.000 SBD |
pending_payout_value | 0.000 SBD |
promoted | 0.000 SBD |
body_length | 50 |
author_reputation | 269,842,971,792,142 |
root_title | 接近开关 |
beneficiaries | [] |
max_accepted_payout | 1,000,000.000 SBD |
percent_steem_dollars | 10,000 |
谢谢 [WhereIn Android] (http://www.wherein.io)
post_id | 94,093,971 |
---|---|
author | lucienyong |
permlink | wherein-1631919376495 |
category | hive-193186 |
json_metadata | {} |
created | 2021-09-17 22:56:18 |
last_update | 2021-09-17 22:56:18 |
depth | 2 |
children | 0 |
net_rshares | 0 |
last_payout | 2021-09-24 22:56:18 |
cashout_time | 1969-12-31 23:59:59 |
total_payout_value | 0.000 SBD |
curator_payout_value | 0.000 SBD |
pending_payout_value | 0.000 SBD |
promoted | 0.000 SBD |
body_length | 45 |
author_reputation | 16,052,975,968,694 |
root_title | 接近开关 |
beneficiaries | [] |
max_accepted_payout | 1,000,000.000 SBD |
percent_steem_dollars | 10,000 |
你好鸭,lucienyong! @boylikegirl给您叫了一份外卖! **南瓜糕** <br> ![](http://ericet.vornix.blog/wp-content/uploads/2018/09/QQ%E5%9B%BE%E7%89%8720180915000443.jpg) 吃饱了吗?跟我猜拳吧! **石头,剪刀,布~** 如果您对我的服务满意,请不要吝啬您的点赞~
post_id | 94,080,158 |
---|---|
author | teamcn-shop |
permlink | wherein-1631875139167 |
category | hive-193186 |
json_metadata | "{"app":"teamcn-shop bot\/1.0"}" |
created | 2021-09-17 10:39:09 |
last_update | 2021-09-17 10:39:09 |
depth | 1 |
children | 0 |
net_rshares | 0 |
last_payout | 2021-09-24 10:39:09 |
cashout_time | 1969-12-31 23:59:59 |
total_payout_value | 0.000 SBD |
curator_payout_value | 0.000 SBD |
pending_payout_value | 0.000 SBD |
promoted | 0.000 SBD |
body_length | 200 |
author_reputation | 65,900,527,192,856 |
root_title | 接近开关 |
beneficiaries | [] |
max_accepted_payout | 1,000,000.000 SBD |
percent_steem_dollars | 10,000 |
好专业。 [WhereIn Android] (http://www.wherein.io)
post_id | 94,081,907 |
---|---|
author | jorden123 |
permlink | wherein-1631878766859 |
category | hive-193186 |
json_metadata | {} |
created | 2021-09-17 11:39:27 |
last_update | 2021-09-17 11:39:27 |
depth | 1 |
children | 1 |
net_rshares | 0 |
last_payout | 2021-09-24 11:39:27 |
cashout_time | 1969-12-31 23:59:59 |
total_payout_value | 0.000 SBD |
curator_payout_value | 0.000 SBD |
pending_payout_value | 0.000 SBD |
promoted | 0.000 SBD |
body_length | 47 |
author_reputation | 8,211,914,981,540 |
root_title | 接近开关 |
beneficiaries | [] |
max_accepted_payout | 1,000,000.000 SBD |
percent_steem_dollars | 10,000 |
哈哈,靠这个吃饭的 [WhereIn Android] (http://www.wherein.io)
post_id | 94,093,975 |
---|---|
author | lucienyong |
permlink | wherein-1631919405586 |
category | hive-193186 |
json_metadata | {} |
created | 2021-09-17 22:56:45 |
last_update | 2021-09-17 22:56:45 |
depth | 2 |
children | 0 |
net_rshares | 0 |
last_payout | 2021-09-24 22:56:45 |
cashout_time | 1969-12-31 23:59:59 |
total_payout_value | 0.000 SBD |
curator_payout_value | 0.000 SBD |
pending_payout_value | 0.000 SBD |
promoted | 0.000 SBD |
body_length | 52 |
author_reputation | 16,052,975,968,694 |
root_title | 接近开关 |
beneficiaries | [] |
max_accepted_payout | 1,000,000.000 SBD |
percent_steem_dollars | 10,000 |