加速传感器(mma7260q)在线座谈和常见问题解答.mht
来自「一些关于加速度传感器的资料」· MHT 代码 · 共 1,441 行 · 第 1/5 页
MHT
1,441 行
From: <由 Microsoft Internet Explorer 5 保存>
Subject: =?gb2312?B?vNPL2bSruNDG9yhNTUE3MjYwUSnU2s/f1/nMuLrNs6O8+87KzOK94rTw?=
Date: Sun, 24 Feb 2008 21:08:52 +0800
MIME-Version: 1.0
Content-Type: multipart/related;
type="text/html";
boundary="----=_NextPart_000_0000_01C87729.757B2BB0"
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198
This is a multi-part message in MIME format.
------=_NextPart_000_0000_01C87729.757B2BB0
Content-Type: text/html;
charset="gb2312"
Content-Transfer-Encoding: quoted-printable
Content-Location: http://www.freescale.com.cn/webcast/Sensors/MMA7260Q/FAQ.asp
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" =
"http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<HTML><HEAD><TITLE>=BC=D3=CB=D9=B4=AB=B8=D0=C6=F7(MMA7260Q)=D4=DA=CF=DF=D7=
=F9=CC=B8=BA=CD=B3=A3=BC=FB=CE=CA=CC=E2=BD=E2=B4=F0</TITLE>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Dgb2312">
<SCRIPT language=3DJavaScript=20
src=3D"http://www.freescale.com.cn/files/abstract/misc/COLLATERALTEMPLATE=
.js"></SCRIPT>
<SCRIPT language=3DJavaScript>;
writeHeader();
</SCRIPT>
<SCRIPT language=3DJavaScript1.2=20
src=3D"http://www.freescale.com.cn/shared/js/HM_header.js"=20
type=3Dtext/javascript></SCRIPT>
<META content=3D"MSHTML 6.00.2900.3243" name=3DGENERATOR></HEAD>
<BODY>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D768 border=3D0><!-- PAGE =
HEADER -->
<TBODY>
<TR>
<TD colSpan=3D3>
<TABLE cellSpacing=3D3 cellPadding=3D3 width=3D750 border=3D0>
<TBODY>
<TR vAlign=3Dtop align=3Dleft>
<TD>
<DIV class=3DSpacer-5px> </DIV></TD></TR>
<TR vAlign=3Dtop align=3Dleft>
<TD>
=
<H1>=BC=D3=CB=D9=B4=AB=B8=D0=C6=F7(MMA7260Q)=D4=DA=CF=DF=D7=F9=CC=B8=BA=CD=
=B3=A3=BC=FB=CE=CA=CC=E2=BD=E2=B4=F0</H1></TD></TR>
<TR vAlign=3Dtop align=3Dleft>
<TD>
<DIV =
class=3DSpacer-5px> </DIV></TD></TR></TBODY></TABLE></TD><!-- PAGE =
HEADER --></TR>
<TR><!-- BEGIN TABLE FRAME - COLUMN 1 - MAIN CONTENT AREA -->
<TD vAlign=3Dtop align=3Dleft width=3D750>
<TABLE cellSpacing=3D3 cellPadding=3D3 width=3D"100%" border=3D0>
<TBODY>
<TR vAlign=3Dtop align=3Dleft>
<TD>
<P>
<TABLE style=3D"BORDER-COLLAPSE: collapse" =
borderColor=3D#111111=20
cellSpacing=3D0 cellPadding=3D2 width=3D"100%" =
align=3Dcenter border=3D1>
<TBODY>
<TR align=3Dmiddle>
<TD colSpan=3D3 =
height=3D34><STRONG><B>=D4=DA=CF=DF=D7=F9=CC=B8=D6=F7=CC=E2=A3=BA=C6=E6=C3=
=EE=B5=C4=B7=C9=CB=BC=BF=A8=B6=FB™=BC=D3=CB=D9=B4=AB=B8=D0=C6=F7=20
</B></STRONG></TD></TR>
<TR>
<TD noWrap bgColor=3D#c6d7ef>[ =CE=CA=CC=E2 1 ]</TD>
<TD bgColor=3D#c6d7ef =
colSpan=3D2>=C7=EB=CE=CA=B8=C3=B4=AB=B8=D0=C6=F7=CA=B9=D3=C3=B5=C4=BC=AB=CF=
=DE=BB=B7=BE=B3=CE=C2=B6=C8=B7=B6=CE=A7?</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 1 ]</TD>
<TD colSpan=3D2>-20 ~ 85 degree C. </TD></TR>
<TR>
<TD bgColor=3D#b0d7b8>[ =CE=CA=CC=E2 2 ]</TD>
<TD bgColor=3D#b0d7b8 =
colSpan=3D2>=C7=EB=CE=CA=BC=D3=CB=D9=B6=C8=B4=AB=B8=D0=C6=F7=B5=C4=BF=B9=B9=
=FD=D4=D8=C4=DC=C1=A6=D4=F5=D1=F9?</TD></TR>
<TR>
<TD noWrap bgColor=3D#ffffff>[ =B4=F0=B0=B8 2 ]</TD>
<TD colSpan=3D2>2000g. But it can be higher for short =
period.=20
When we talk about Max g overload, we need to see the =
period=20
as well. </TD></TR>
<TR>
<TD bgColor=3D#c6d7ef>[ =CE=CA=CC=E2 3 ]</TD>
<TD bgColor=3D#c6d7ef colSpan=3D2>MMA7260Q =
=B5=C4=C4=DA=B2=BF=BC=D3=CB=D9=B6=C8=B2=C9=D1=F9=CB=D9=C2=CA=CA=C7=B6=E0=C9=
=D9?=CA=B2=C3=B4=D1=F9=B5=C4 A/D=20
=
=B2=C9=D1=F9=C2=CA=BA=CD=CA=B2=C3=B4=D1=F9=B5=C4=B5=E7=D4=B4=BF=AA=B9=D8=C6=
=B5=C2=CA=B2=C5=C4=DC=B2=BB=D3=B0=CF=EC=BC=D3=CB=D9=B6=C8=BC=C6=B5=C4=B2=C9=
=D1=F9? </TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 3 ]</TD>
<TD colSpan=3D2>MMA7260Q =CA=C7 11KHz, 400Hz =
=D2=D4=CF=C2=BB=E1=D3=B0=CF=EC=BC=D3=CB=D9=B6=C8=B5=C4=B2=C9=D1=F9=A1=A3 =
</TD></TR>
<TR>
<TD bgColor=3D#b0d7b8>[ =CE=CA=CC=E2 4 ]</TD>
<TD bgColor=3D#b0d7b8 =
colSpan=3D2>=BC=D3=CB=D9=B6=C8=C4=DC=B7=F1=D3=EB GPS =
=C5=E4=CC=D7=CA=B9=D3=C3=D7=F7=CE=AA=D4=DA GPS=20
=
=CE=DE=D0=C5=BA=C5=CA=B1=B5=BC=BA=BD=D3=C3=A3=AC=CA=C7=B7=F1=B1=D8=D0=E8 =
3 =D6=E1=B4=AB=B8=D0=C6=F7?</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 4 ]</TD>
<TD colSpan=3D2>Accelerometer can be used in GPS DR. But =
it may=20
need 2 3-axis accelerometer and 1 Gyroscpoe to =
complete the=20
application. One accelerometer is not enough for GPS =
DR.=20
</TD></TR>
<TR>
<TD bgColor=3D#c6d7ef>[ =CE=CA=CC=E2 5 ]</TD>
<TD bgColor=3D#c6d7ef =
colSpan=3D2>=BC=D3=CB=D9=B4=AB=B8=D0=C6=F7=D3=EB=B3=B5=CB=D9=B4=AB=B8=D0=B5=
=C4=C7=F8=B1=F0?</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 5 ]</TD>
<TD colSpan=3D2>Accelerometer can detect acceleration =
without=20
any external equipment. So it is convenient to install =
and use=20
to detect acceleration, speed and distance. </TD></TR>
<TR>
<TD bgColor=3D#b0d7b8>[ =CE=CA=CC=E2 6 ]</TD>
<TD bgColor=3D#b0d7b8=20
=
colSpan=3D2>=B8=D0=D3=A6=D6=E1=D3=EBX=A1=A2Y=A1=A2Z=D6=E1=D3=D0=BA=CE=B2=BB=
=CD=AC?=D7=F6=C7=E3=D0=B1=B2=E2=C1=BF=CA=B1=A3=AC=B6=D4=B8=D0=D3=A6=D6=E1=
=B5=C4=B7=BD=CF=F2=D3=D0=BA=CE=D2=AA=C7=F3? </TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 6 ]</TD>
<TD colSpan=3D2>All axes are the same except sensitivity =
and=20
bandwidth spec. There is no any installation request =
for=20
3-axes sensor. However, it must be limit user's =
installation=20
angle when use two-axes sensor. </TD></TR>
<TR>
<TD bgColor=3D#c6d7ef>[ =CE=CA=CC=E2 7 ]</TD>
<TD bgColor=3D#c6d7ef =
colSpan=3D2>=B8=C3=B4=AB=B8=D0=C6=F7=CA=C7=CA=B2=C3=B4=BD=D3=BF=DA=C0=E0=D0=
=CD? </TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 7 ]</TD>
<TD colSpan=3D2>Analog output. </TD></TR>
<TR>
<TD bgColor=3D#b0d7b8>[ =CE=CA=CC=E2 8 ]</TD>
<TD bgColor=3D#b0d7b8 colSpan=3D2>6g =
=B5=C4=D5=F0=B6=AF=B6=D4 MMA7260Q =
=B5=C4=CA=E4=B3=F6=BB=E1=D3=D0=B6=E0=B4=F3=B5=C4=D3=B0=CF=EC?=20
</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 8 ]</TD>
<TD colSpan=3D2>Assuming you have set MMA7260Q to 6g, =
then you=20
need to work out what 6g corresponds to in terms of =
your full=20
scale voltage output and map this to your A/D reading. =
So, one=20
expects 6g to be close to VDD or near 255 for 8bit =
A/D. </TD></TR>
<TR>
<TD bgColor=3D#c6d7ef>[ =CE=CA=CC=E2 9 ]</TD>
<TD bgColor=3D#c6d7ef =
colSpan=3D2>=C8=E7=BA=CE=D3=C3=B4=CB=D0=BE=C6=AC=B9=B9=BD=A8=D2=BB=B8=F6=CA=
=B9=D3=C3=B5=C4=D7=EE=D0=A1=CF=B5=CD=B3? =
=B7=C9=CB=BC=BF=A8=B6=FB=CA=C7=B7=F1=CC=E1=B9=A9=BD=E2=BE=F6=B7=BD=B0=B8?=
=20
</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 9 ]</TD>
<TD colSpan=3D2>It is because Freescale's accelerometer =
must be=20
used with MCU to achieve the function. Freescale can =
support=20
small package MCU to build up a small system board. =
</TD></TR>
<TR>
<TD bgColor=3D#b0d7b8>[ =CE=CA=CC=E2 10 ]</TD>
<TD bgColor=3D#b0d7b8 =
colSpan=3D2>=C7=EB=CE=CA=BC=D3=CB=D9=B6=C8=B4=AB=B8=D0=C6=F7=D3=A6=D3=C3=D3=
=DA=C8=CB=CC=E5=CA=E4=C8=EB=D1=A7=C9=E8=B1=B8=D3=D0=CE=DE=B1=C8=BD=CF=B3=C9=
=CA=EC=B5=C4=B2=FA=C6=B7?=20
</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 10 ]</TD>
<TD colSpan=3D2>Current sensor can be used but algrothem =
is=20
needed. </TD></TR>
<TR>
<TD bgColor=3D#c6d7ef>[ =CE=CA=CC=E2 11 ]</TD>
<TD bgColor=3D#c6d7ef colSpan=3D2>Z =D6=E1=D3=EB X , Y =
=D6=E1=B5=C4=C1=E9=C3=F4=B6=C8=CF=E0=CD=AC=C2=F0? </TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 11 ]</TD>
<TD colSpan=3D2>For the 3 axis, in the strictist sense, =
yes but=20
all three axis of our devices are very close and our =
spec is=20
0.8V/g. That is why we have a X-axis sensitivity spec =
as well=20
(5%). </TD></TR>
<TR>
<TD bgColor=3D#b0d7b8>[ =CE=CA=CC=E2 12 ]</TD>
<TD bgColor=3D#b0d7b8 =
colSpan=3D2>=B7=C9=CB=BC=BF=A8=B6=FB=BC=D3=CB=D9=B4=AB=B8=D0=C6=F7=D3=D0=CA=
=B2=C3=B4=CD=BB=B3=F6=B5=C4=D3=C5=B5=E3=BA=CD=D0=D4=C4=DC? </TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 12 ]</TD>
<TD colSpan=3D2>Freescale accelerometer has best =
electronic=20
performance in terms of power consumption (Idd 0.5mA) =
vs=20
sensitivity (800mV/g) vs noise (4.7mVrms). Also =
fastest=20
response time typical 1ms power on response, 0.5mS =
from sleep=20
mode to on. 4 G range selectable. This means one =
device can be=20
used for 1.5g, 2g, 4g and 6g in one end product. =
Price/Value=20
comparison is very good. </TD></TR>
<TR>
<TD bgColor=3D#c6d7ef>[ =CE=CA=CC=E2 13 ]</TD>
<TD bgColor=3D#c6d7ef =
colSpan=3D2>=D4=DA=B7=C9=CB=BC=BF=A8=B6=FB MMA7260Q =
=D0=C2=CE=C5=B7=A2=B2=BC=CD=F8=D2=B3=BF=B4=B5=BD=20
=
"=CE=DE=CF=DF=B4=AB=B8=D0=C6=F7=CD=F8=C2=E7=BC=BC=CA=F5" =
=B5=C4=CC=E1=B7=A8=A3=AC=C7=EB=CE=CA=B8=C3=BC=BC=CA=F5=CA=C7=BA=CE=B8=C5=C4=
=EE?=BC=D3=CB=D9=B6=C8=B4=AB=B8=D0=C6=F7=D3=EB=CB=FC=D3=D0=BA=CE=C1=AA=CF=
=B5?</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 13 ]</TD>
<TD colSpan=3D2>Freescale has another wireless chip =
Zigbee.=20
Transmitting sensor output with Zigbee, it can =
accomplish=20
small wireless network application.</TD></TR>
<TR>
<TD bgColor=3D#b0d7b8>[ =CE=CA=CC=E2 14 ]</TD>
<TD bgColor=3D#b0d7b8=20
=
colSpan=3D2>=B7=C9=CB=BC=BF=A8=B6=FB=CA=C7=B7=F1=BB=E1=D4=DA=BD=FC=C6=DA=C4=
=DA=CC=E1=B9=A9=B8=DF=D6=D8=C1=A6=BC=D3=CB=D9=B6=C8=B4=AB=B8=D0=C6=F7=A3=A8=
40g=D2=D4=C9=CF=A3=A9=A3=AC=D2=D4=D6=A7=B3=D6=C6=FB=B3=B5=C5=F6=D7=B2=BC=EC=
=B2=E2?</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 14 ]</TD>
<TD colSpan=3D2>Freescale has sensors g range from 1.5g =
up to=20
250g. We have shipped hundreds million 40g above =
sensor for=20
car crash (airbag application). </TD></TR>
<TR>
<TD bgColor=3D#c6d7ef>[ =CE=CA=CC=E2 15 ]</TD>
<TD bgColor=3D#c6d7ef colSpan=3D2>MMA7260Q =
=BC=D3=CB=D9=B6=C8=B4=AB=B8=D0=C6=F7=B5=C4 ESD=20
=B1=A3=BB=A4=D0=D4=C4=DC=C8=E7=BA=CE?</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 15 ]</TD>
<TD colSpan=3D2>HB ESD 2kV. </TD></TR>
<TR>
<TD bgColor=3D#b0d7b8>[ =CE=CA=CC=E2 16 ]</TD>
<TD bgColor=3D#b0d7b8 =
colSpan=3D2>=C7=EB=CE=CA=CE=C2=B6=C8=B2=B9=B3=A5=C8=E7=BA=CE=B4=A6=C0=ED?=
=CA=C7=D2=AA=D3=C3=BB=A7=B4=A6=C0=ED=A3=AC=BB=B9=CA=C7 IC=20
=
=B1=BE=C9=ED=D7=D4=BC=BA=BD=F8=D0=D0=C1=CB=B4=A6=C0=ED?</TD></TR>
<TR>
<TD bgColor=3D#ffffff>[ =B4=F0=B0=B8 16 ]</TD>
<TD colSpan=3D2>IC =C4=DA=B2=BF=D3=D0=B4=A6=C0=ED, =
=B2=BB=D0=E8=D3=C3=BB=A7=B4=A6=C0=ED=A1=A3 </TD></TR>
<TR>
⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?