| 主题：奇妙的飞思卡尔加速传感器 |
| 在线问答： |
| [问：polymorph] |
请问老师：对于加速度不稳定的测量有自动调节么？就是会不会根据G值变化自动调节？
还是需要MCU调节？ |
| [答：飞思卡尔] |
Yes, according to different G-level to adjust G-select pin by MCU |
[2005-12-15 10:41:10] |
| [问：jack_welch] |
加速传感器与车速传感的区别！ |
| [答：飞思卡尔] |
Accelerometer could detect acceleration without any external equipment.
So it is convenient to install and use to detect acceleration, speed and
distance. |
[2005-12-15 10:50:14] |
| [问：bluesprit] |
该加速传感器支持三维感应吗 |
| [答：飞思卡尔] |
MMA7260Q could support 3-axes acceleration detection with only one chip. |
[2005-12-15 10:51:03] |
| [问：bluesprit] |
加速计传感器如何在MP3设计方案中添加，通过什么总线控制？ |
| [答：飞思卡尔] |
如有AD接口,可经RC filter直接连。如没有,可加MCU或ADC在中间,通过SPI或IIC控制。加MCU的优点是在MP3关机的时候,可加一些增值功能(如计步器或防盗)。 |
[2005-12-15 10:52:11] |
| [问：lyongjun] |
加速度能否与GPS配套使用作为在GPS
无信号时导航用，是否必需3轴传感器
另外，2轴和3轴传感器的价格是多少 |
| [答：飞思卡尔] |
Accelerometer can be used in GPS DR. But it may need 2 3-axis accelerometer
and 1 Gyroscpoe to complete the application. One accelerometer is not
enough for GPS DR.
For pricing, please inq. thru FSL local office or FSL distributor. |
[2005-12-15 10:54:14] |
| [问：eagle_bluesky] |
请问汽车侧向加速度的测量能采用什么类型的加速度传感器？ |
| [答：飞思卡尔] |
可用X-Y轴传感器 (You can use X-Y senfor for tilt detect for auto) |
[2005-12-15 10:55:18] |
| [问：ypqecum] |
飞思卡尔TM加速传感器属于MEMS（微机械电子系统）器件么？家电行业有什么应用？ |
| [答：飞思卡尔] |
Yes, the accelerometer is MEMS device. It could be used in washing machine
to detect motor vibration for safety control. |
[2005-12-15 10:56:00] |
| [问：mengfei] |
如果要用加速度传感器来测量风速，你们有这样的应用范例？ |
| [答：飞思卡尔] |
没有如此的应用范例 |
[2005-12-15 10:56:25] |
| [问：ybzh] |
请问用加速度传感器数据两次积分求位移这种方法是否能在工程实际当中使用？ |
| [答：飞思卡尔] |
要考虑地心引力的影响,可用Numerical Method的方法计算,位移一般不会很准确。 |
[2005-12-15 10:57:47] |
| [问：sysclock] |
芯片除rs232,还提供哪些外部接口呢? |
| [答：飞思卡尔] |
芯片没有RS232,只有Analog输出。 |
[2005-12-15 10:58:42] |
| [问：eagle_bluesky] |
请问汽车侧向加速度的测量采用什么型号的传感器 |
| [答：飞思卡尔] |
Part No. as MMA2260D |
[2005-12-15 11:01:04] |
| [问：zhyrui] |
请问采用MMA7260Q可否作为一般的震动检测？ |
| [答：飞思卡尔] |
可以作为一般的震动检测 |
[2005-12-15 11:01:48] |
| [问：通天晓] |
1.1000Hz范围内能达到多少?
2. |
| [答：飞思卡尔] |
1. Sensativity performance is related to power supply Vdd and Idd. When
we compare sensativity, we also need to compare Vdd and Idd. If you see
at same Vdd and Idd level, you may also want to check noise level as increase
gain may get high sensativity, but noise level also increased. Hence,
sensativity is not stand alone spec. We have to benchmarking it with Power
supply, comsuption, noise togather.
We have no digital output low-g accelerometer in production at moment. |
[2005-12-15 11:01:55] |
| [问：heatwork] |
1,由加速度值积分求速度、位移，累计误差如何考虑，大致范围多大，有无试验结果。
2,freescale提供的加速度传感器频响特性如何？频带宽度？ |
| [答：飞思卡尔] |
Our sensor is able to measure acceleration within good accuracy +/-7.5%.
But to integrate with time, errors will accumulated and one needs to like
at the initial raw data and determine what is needed before processing.
So the answer depends on how accurate have you capture the raw data and
it would be expected that the user knows what is going on with the exact
movement of the sensor. Unfortunately, we do not have analysis done for
position with respect to accuracy because this is highly dependent on
the degree of data capturing and algorthim used. |
[2005-12-15 11:02:52] |
| [问：linuxfans] |
贵公司是否会在近期内提供高重力加速度传感器（40g以上），以支持汽车碰撞检测？ |
| [答：飞思卡尔] |
FSL have sensors g range from 1.5g up to 250g. We have shipped hundreds
million 40g above sensor for car crash (airbag application). |
[2005-12-15 11:03:33] |
| [问：yjems] |
专家您好！目前市场上有多种类型的加速度传感器产品，有的是基于压电晶体，有的则基于电容、电阻应变片等。请问芯片化的加速度传感器与这些传统的加速传感器相比，有什么样的特点和不足？谢谢！ |
| [答：飞思卡尔] |
The benefit to use silicon device is to save power consumption, increase
reliability, digital data to analyze and save system design PCB space.
However, the price may be higher than the mechanical parts. |
[2005-12-15 11:04:22] |
| [问：32kmcu] |
请问加速度传感器可以申请样片吗?成都地区如何申请? |
| [答：飞思卡尔] |
Yes. You can apply sample thru our distributor or logon our website.
WWW.Freescale.com/products/sensors |
[2005-12-15 11:05:12] |
| [问：yzl1114] |
MMA7260Q 的内部加速度采样速率是多少？
什么样的A/D采样率和什么样的电源开关频率才能不影响加速度计的采样？ |
| [答：飞思卡尔] |
7260是11KHz,400Hz以下会影响加速度的采样. |
[2005-12-15 11:05:36] |
| [问：polymorph] |
加速传感器在环境测量中会有什么应用呢 ？ |
| [答：飞思卡尔] |
It could be used to detect bridge or dam for vibration or tilt angle
monitoring. |
[2005-12-15 11:06:14] |
| [问：owenzhang] |
请问：MMA6260Q可否用于电脑鼠标的开发。 |
| [答：飞思卡尔] |
我们有伙伴正在开发。 |
[2005-12-15 11:06:35] |
| [问：lyongjun] |
与GPS(汽车)配合的G值采用1.5g 2g 还是其它参数更好 |
| [答：飞思卡尔] |
You did not mention what parameter you want to detect. For high sensativity,
it will need 1.5g. |
[2005-12-15 11:06:50] |
| [问：xieguangye] |
2轴加速度传感器如何消除机械安装产生的方向性误差（芯片焊接不完成平行于PCB，芯片方向于仪器外壳标住记方向间误差）？这个误差能否计算出来？ |
| [答：飞思卡尔] |
You need to refer to our appnotes AN3107. Basically you need to detemine
the reference point for which the sensor is mounted. To obtain the most
resolution per degree of change, the IC should be mounted with the sensitive
axis
parallel to the plane of movement where the most sensitivity is desired.
For example, if the degree range that an application will be measuring
is only 0° to 45° and the PCB will be mounted perpendicular to gravity,
then an X-Axis device would be used. With this then your reference point
is the initial mounting of the device and your reference angle would be
the cosine of that sensor axis to gravity. Yes you can determine the error
by taking one measurement with one A/D step change at various points of
your scale (ie 0deg, +90deg etc). |
[2005-12-15 11:09:10] |
| [问：danyhj] |
请问陀螺传感器、速度传感器和加速传感器的区别？ |
| [答：飞思卡尔] |
The accelerometer could be used to detect linear acceleration. However,
the gyro is used to detect angular acceleration. |
[2005-12-15 11:09:28] |
| [问：jimmy88531] |
加速度传感器能否同时提供x.y、z三个方向上的加速度信号？ |
| [答：飞思卡尔] |
三轴加速度传感器可同时提供x.y、z三个方向上的加速度信号 |
[2005-12-15 11:09:58] |
| [问：sysclock] |
如何用此芯片构建一个使用的最小系统?飞思卡尔是否提供解决方案? |
| [答：飞思卡尔] |
Because Freescale"s accelerometer must be used with MCU to achieve the
function. Freescale could support small package MCU to build up a small
system board. |
[2005-12-15 11:11:14] |
| [问：13824303520yang] |
三轴加速计有数子输出的吗?如果没有能否做到数字输出,大约时间要多久.现有产品只有IIC接口,而MMA7260Q只有模拟输出,在不用有AD转换的MCU时,有没有其它办法可以解决.谢谢! |
| [答：飞思卡尔] |
We do not have digital output at moment. |
[2005-12-15 11:13:19] |
| [问：polymorph] |
MMA7260Q加速度传感器的ESD保护性能如何? |
| [答：飞思卡尔] |
HB ESD 2kV. |
[2005-12-15 11:13:51] |
| [问：xsj19810419] |
硬盘内置加速器传感器来保护硬盘是怎么回事？ |
| [答：飞思卡尔] |
当硬盘不慎掉落时 加速器传感器会侦查到 而将硬盘的指针回到原本位置 以避免指针刮伤到硬盘的磁道 |
[2005-12-15 11:15:28] |
| [问：sunyzhang] |
在用7260Q时,如何选择g,也就是说怎么知道我所应用的g的范围,比如震动过程,g的大小如何确定的? |
| [答：飞思卡尔] |
要看看最大加速度的数值,7260的好处是可变换这值-所以,可以当AD的值过大时,变换更大的最大加速度值；相反,当AD值小时,变换更小值,从而得到更敏感的加速度。 |
[2005-12-15 11:16:00] |
| [问：maszcy] |
在贵公司MMA7260Q新闻发布网页看到“无线传感器网络技术”的提法，请问该技术是何概念？加速度传感器与它有何联系？ |
| [答：飞思卡尔] |
FSL has another wireless chip Zigbee. Transmitting sensor output with
Zigbee, it can accomplish small wireless network application. |
[2005-12-15 11:16:51] |
| [问：maszcy] |
感应轴与X、Y、Z轴有何不同？做倾斜测量时，对感应轴的方向有何要求？ |
| [答：飞思卡尔] |
All axes are the same except sensitivity and bandwidth spec. There is
no any installation request for 3-axes sensor. However, it must be limit
user"s installtion angle when use two-axes sensor. |
[2005-12-15 11:18:05] |
| [问：kongfb] |
MMA7260Q加速度传感器的输出能力有多大?能和那种类型接口? |
| [答：飞思卡尔] |
它是Analog输出,从0+0.25V到Vdd-0.25V。可接AD口。 |
[2005-12-15 11:18:37] |
| [问：emalecumt] |
传感器的精度如何？倾角能达到多少精度？ |
| [答：飞思卡尔] |
Our sensor is able to measure acceleration within good accuracy +/-7.5%
for a fullscale span of 2g. This will go up significantly for very high
g range devices.
Our accelerometers do not have alinear response for tilt. The
tilt accuracy depends on a number of things:
1) Noise level of your system
2) Sensitivity of device selected
3) A/D resolution
4) What area of the response curve are you in with the angle of interests.
To give you an idea, our mma6200 device with sensitivity of 0.8V/g and
using an A/D of 10bit will give accuracy of 0.229 at 0degrees (highest
sensitivity point of the response). This will improved with increased
A/D resolutions. |
[2005-12-15 11:18:40] |
| [问：kevinlee] |
有没有关于TPMS方面的加速度传感器？ |
| [答：飞思卡尔] |
现在无 正规划中 |
[2005-12-15 11:21:24] |
| [问：owenzhang] |
请问：用MMA6260开发电脑鼠标需要注意哪些方面的问题？ |
| [答：飞思卡尔] |
要注意地心引力,在没有加速的情形下是不能测知。 |
[2005-12-15 11:21:47] |
| [问：hyjlm] |
请问飞思卡尔TM加速传感器的频响范围是多少?最低频响是多少? |
| [答：飞思卡尔] |
Our Accelerometers are ranged from dc to 350Hz for X and Y axis and
around 200Hz for Z axis. The min frequency response would depend on the
loading of the low pass filter or the A/D converter that is connected
to it. Pls refer to our datasheets MMA7260Q. |
[2005-12-15 11:22:21] |
| [问：polymorph] |
三轴加速度传感器是否X,Y和Z三轴都有输出?此时MCU如何判断?是”与功能”还是”或功能”? |
| [答：飞思卡尔] |
是,要有三个AD囗来分别三轴。 |
[2005-12-15 11:23:08] |
| [问：emalecumt] |
测量倾角能达到多高的精度? |
| [答：飞思卡尔] |
Our accelerometers do not have an non linear response. The
tilt accuracy depends on a number of things:
1) Noise level of your system
2) Sensitivity of device selected
3) A/D resolution
4) What area of the response curve are you in with the angle of interests.
To give you an idea, our mma6260 device with sensitivity of 0.8V/g and
using an A/D of 10bit will give accuracy of 0.229 at 0degrees (highest
sensitivity point of the response). This will improved with increased
A/D resolutions. |
[2005-12-15 11:23:48] |
| [问：owenzhang] |
请问：用MMA6260开发电脑鼠标是客户还是IDH?Freescale有参考设计提供吗？ |
| [答：飞思卡尔] |
是IDH。飞思卡尔现在没有参考设计。 |
[2005-12-15 11:23:59] |
| [问：shawbin] |
请介绍MMA7260Q加速度传感器内部滤波器的性能,它的截止频率有多高? |
| [答：飞思卡尔] |
Sensing element resonant frenqency XY at 6kHz, Z at 3.4kHz. Bandwidth
response xy at 350Hz, Z at 150Hz. |
[2005-12-15 11:24:12] |
| [问：kongfb] |
能否提供应用电路?是采用那种耦合方式?如何进行敏感轴校准? |
| [答：飞思卡尔] |
The accelerometer datasheet has provided application circuits. The sensor
output is series 1K ohms resistor to MCU A/D pin. There is detailed information
about calibration on the document AN1986. It could be got from Freescale"s
website. |
[2005-12-15 11:24:15] |
| [问：ybzh] |
您的加速度传感器有频率下限吗？是多少呢？ |
| [答：飞思卡尔] |
没有频率下限 |
[2005-12-15 11:25:38] |
| [问：shawbin] |
一般来说, 加速度传感器对电源的波纹要求高吗? |
| [答：飞思卡尔] |
Yes. Power suply must be clean. |
[2005-12-15 11:25:50] |
| [问：yzl1114] |
MMA1260与MMA6260的采样率分别是多少？ |
| [答：飞思卡尔] |
The bandwidth response is 50Hz for the two chips. |
[2005-12-15 11:26:34] |
| [问：wz623] |
如何消除极化电压的影响？ |
| [答：飞思卡尔] |
可否详细一点？ |
[2005-12-15 11:26:51] |
| [问：huitang_shen] |
请问该传感器使用的极限环境温度范围。 |
| [答：飞思卡尔] |
-20 ~ 85 degree C |
[2005-12-15 11:28:04] |
| [问：sunyzhang] |
MMA7260Q的内部采样率是11KHZ,是不是说A/D采样率太低就会影响内部采样? |
| [答：飞思卡尔] |
不是。内部采样是固定的。 |
[2005-12-15 11:28:23] |
| [问：linuxfans] |
请问加速度计的带宽是指C-V Convertor的采样速率还是最终输出模拟信号的采样速率？ |
| [答：飞思卡尔] |
There"s an internal low pass filter that shapes the bandwidth response
to 350Hz for X & Y axis and 150Hz-200Hz for Z axis. Then this might
be impaired by the external loading from your filtering caps or ADC. So
it depends where the bottleneck is with respect to loading on our device. |
[2005-12-15 11:28:55] |
| [问：supernemocn] |
加速度芯片对焊接、安装有什么特殊要求？ |
| [答：飞思卡尔] |
The detailed information could be got from AN1902 and DL200. It could
be found in Freescale website. |
[2005-12-15 11:30:32] |
| [问：polymorph] |
请问能否用来测量环境中墙壁，窗户等的震动？例如：汽车，飞机经过时窗户玻璃的震动... |
| [答：飞思卡尔] |
可以 |
[2005-12-15 11:32:17] |
| [问：ljx_wxy
_ljx_wxy] |
请问！今后的传感器能否把各种应用的算法做进去，用户只需进行读写操作就可以了？ |
| [答：飞思卡尔] |
应用的范围太广了,配MCU便可。 |
[2005-12-15 11:32:58] |
| [问：jacksong1977] |
请问什么是加速计, 他的工作原理是怎样的? 谢谢 |
| [答：飞思卡尔] |
此在线座谈是介绍飞思卡尔加速计, 所以你可到中电网网站回放在线座谈 |
[2005-12-15 11:32:59] |
| [问：shawbin] |
MMA7260Q加速度传感器随加速度和电源电压的线性性能如何? |
| [答：飞思卡尔] |
There is temperature compensation circuits in Freescale accelerometer.
So the output linearity is good. |
[2005-12-15 11:33:01] |
| [问：duandj1] |
频率相应如何？ |
| [答：飞思卡尔] |
Sorry I do not know your exact question in mind, do you mean what is
the freq response? If so the X,Y axis for out triple axis is 350Hz and
that of the Z is 150~200Hz. |
[2005-12-15 11:33:40] |
| [问：liangtian] |
假设我要测量汽车的速度,我是直接通过检测轮速更快还是用加速度传感器测量再进行积分运算快呢?你们有这方面的比较数据吗? |
| [答：飞思卡尔] |
最简单的还是直接通过检测轮速,我们没有比较数据。 |
[2005-12-15 11:35:24] |
| [问：danyhj] |
是否适合应用在家电产品上？ |
| [答：飞思卡尔] |
Yes, for example it could be used in washing machine to detect motor
vibration for safety monitor usage. |
[2005-12-15 11:36:01] |
| [问：xhtxzxw] |
在“车载运动中卫星通信”系统里，飞思卡尔加速传感器是否具有应用价值？ |
| [答：飞思卡尔] |
Yes. We have some customers use FSL accelerometers in this application. |
[2005-12-15 11:36:03] |
| [问：linuxfans] |
请问加速度传感器应用于人体输入学设备有无比较成熟的产品？ |
| [答：飞思卡尔] |
Current sensor can be used but algrothem is needed. |
[2005-12-15 11:37:28] |
| [问：wanghl0001] |
加速度传感器可否应用在液体流量控制中？ |
| [答：飞思卡尔] |
We have not experimented with this but asuming that you have the device
well protected from water, it can work fine. But then it depends on what
you are trying to achieve. And relative fluid viscosity needs to be taken
into account. Other than this we have no further inputs. |
[2005-12-15 11:38:55] |
| [问：maszcy] |
在贵公司网站上看到,三星电子在数字音频播放器中采用了加速度传感器,通过倾斜和自由下落检测实现了滚动菜单的功能,请做详细介绍.谢谢. |
| [答：飞思卡尔] |
There is detailed information on the application note document AN3107
and AN1986. It could be found in Freescale"s website. |
[2005-12-15 11:39:32] |
| [问：polymorph] |
加速度传感器如何防范时钟对性能的干扰? |
| [答：飞思卡尔] |
要看看时钟频率和走线。 |
[2005-12-15 11:39:52] |
| [问：wyman] |
大学生可以申请飞思卡尔有关传感器或其它方面的芯片吗？如果能程序是怎样的？ |
| [答：飞思卡尔] |
你可在飞思卡尔网站免费申请样品: http://www.freescale.com/webapp/sps
/site/overview.jsp?nodeId
=010984007869597059286929489 |
[2005-12-15 11:40:13] |
| [问：xsj19810419] |
低重力加速度传感器主要用于哪里？ |
| [答：飞思卡尔] |
You may logon FSL sensor website to get detailed application from MMA7260Q
Factsheet. |
[2005-12-15 11:40:14] |
| [问：linuxfans] |
请问贵公司是否有位移传感器或速度传感器之类的产品？ |
| [答：飞思卡尔] |
No. |
[2005-12-15 11:40:25] |
| [问：shawbin] |
请介绍MMA7260Q加速度传感器的输出性能,能否直接和ADC相连接? |
| [答：飞思卡尔] |
Please refer MMA7260Q datasheet which can down loaded from FSL Sensor
website. Yes, it can connect to ADC directly. |
[2005-12-15 11:41:32] |
| [问：zhangweiqing] |
如何有效抗汽车的高频干扰 |
| [答：飞思卡尔] |
The sensor output purity depends on the input power. There is detailed
information about power design on the document AN1988. It could be found
in Freescale"s website. |
[2005-12-15 11:41:40] |
| [问：pcxiu] |
大小如何，灵敏度如何？ |
| [答：飞思卡尔] |
Our size is 6x6x1.45mm in size for our tri-axis sensor. Our sensor is
able to measure acceleration within good accuracy +/-7.5% for a fullscale
span of 2g. This will go up significantly for very high g range devices. |
[2005-12-15 11:41:51] |
| [问：youyubing] |
请问谁是飞思卡尔加速传感器福建代理？同时飞思卡尔的其它器件是否也有代理，谢谢。 |
| [答：飞思卡尔] |
以下是飞思卡尔代理商在厦门联系信息, 您亦可按"地区检索" 查看其它地区： http://www.freescale.com.cn/others
/wheretobuy/location4.asp |
[2005-12-15 11:43:58] |
| [问：eagl |
