Groups
Groups
Sign in
Groups
Groups
Cortex-M3内核的应用
Conversations
About
Send feedback
Help
『转载』加速度传感器灵敏度
22 views
Skip to first unread message
杨萌
unread,
Dec 28, 2011, 12:52:23 AM
12/28/11
Reply to author
Sign in to reply to author
Forward
Sign in to forward
Delete
You do not have permission to delete messages in this group
Copy link
Report message
Show original message
Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message
to Cortex-M3内核的应用
1)、LSB的意思是最小有效位,为数字输出方式,一般我们可以用mg/LSB来表示灵敏度,举个例子来说,ADI的加速度传感器ADXL345量程为
+/2g,输出的位数为10位(2的10次方共1024个LSB)对应满量程,那么灵敏度就为4g/1024LSB=3.9mv/g,取倒数为
256LSB/g。
2)、count为计数单位,为数字输出方式,比如说我们的SCA820-D04,量程为+/-2g,灵敏度为900count/g,速度为0g是输出
为0count,也就是说1g的时候对应输出应该为900count,-1g的时候输出为-900count。
3)、V/g为模拟电压输出的灵敏度表示方式。
4)、简单的介绍下V/g和V/°的换算公式,以SCA100T-D01为例,其灵敏度为4V/g换算成mV/°等于4*sin1°=69.8mV/
°,规格书上写的是70mV/°。此外SCA100T-D01传感器从零点转动15度,电压的变化=4*sin15°=1.035V,对应15度输出电
压=2.5+1.035=3.503V,对应-15度输出电压=2.5-1.035=1.465V。注意,转动15度的电压变化不能算成70mV/
°*15,这样计算式错误的。
Reply all
Reply to author
Forward
0 new messages