'Hardware/sensors'에 해당되는 글 6건
- 2008.08.02 [월간 전자기술] 센서의 활용
- 2008.08.02 myGyro300SPI
- 2008.07.28 Motion Tracker MT9
- 2007.01.19 WSN (Wireless Sensor Network)
- 2007.01.19 sensor terms
- 2006.12.14 accelerometer 가속도 센서 - MMA7260Q datasheet
'Hardware > sensors' 카테고리의 다른 글
| [월간 전자기술] 센서의 활용 (0) | 2008.08.02 |
|---|---|
| Motion Tracker MT9 (0) | 2008.07.28 |
| WSN (Wireless Sensor Network) (0) | 2007.01.19 |
| sensor terms (0) | 2007.01.19 |
| accelerometer 가속도 센서 - MMA7260Q datasheet (0) | 2006.12.14 |
Platform: Windows 2000/XP (1)
Output:
• 3D orientation
o Quaternions
o Euler Angles (xyz)
o Rotation Matrix
• 3D rate of turn
• 3D acceleration
• 3D magnetic field strength
• Temperature
Dynamic Range: all angles in 3D
Angular Resolution: 0.05° RMS (2)
Static Accuracy: <1° (3)
Dynamic Accuracy: 3° RMS (4)
Turn On Time: 50 ms (5)
Sample Frequency: 100 Hz (6)
http://en.wikipedia.org/wiki/Quaternion
http://en.wikipedia.org/wiki/Euler_angles
*** http://en.wikipedia.org/wiki/Quaternions_and_spatial_rotation
*** http://en.wikipedia.org/wiki/Conversion_between_quaternions_and_Euler_angles
http://en.wikipedia.org/wiki/ECEF
ECEF stands for Earth-Centered, Earth-Fixed, and is a Cartesian coordinate system used for GPS, and is sometimes known as a "conventional terrestrial" system[1]. It represents positions as an X, Y, and Z coordinate. The point (0,0,0) denotes the mass center of the earth, hence the name Earth-Centered. The z-axis is defined as being parallel to the earth rotational axes, pointing towards north. The x-axis intersects the sphere of the earth at the 0° latitude, 0° longitude. This means the ECEF rotates with the earth around its z-axis. Therefore, coordinates of a point fixed on the surface of the earth do not change, hence the name earth-fixed.
http://www.aerojockey.com/papers/meng/node7.html
http://en.wikipedia.org/wiki/Random_walk
http://en.wikipedia.org/wiki/Comma-separated_values
MT9 Sensor Fact Table
Rate of turn sensor 'Gyroscope' - Solid state, “tuning fork concept”
Magnetometer - Thin film magnetoresistive
http://en.wikipedia.org/wiki/Capacitor
http://en.wikipedia.org/wiki/Tuning_fork
http://en.wikipedia.org/wiki/Magnetoresistance
RS-232 Serial Connection Settings
Setting: Value
Data bits: 8
Parity: none
Stop bits: 1
Flow control: none
http://en.wikipedia.org/wiki/Endianness
In computing, endianness is the byte (and sometimes bit) ordering used to represent some kind of data. Typical cases are the order in which integer values are stored as bytes in computer memory (relative to a given memory addressing scheme) and the transmission order over a network or other medium. When specifically talking about bytes, endianness is also referred to simply as byte order.
http://en.wikipedia.org/wiki/Endianness#Big-endian
http://www.webopedia.com/TERM/b/baud.html
Data packet MT9
Physical Specifications overview
Operating Voltage: 6 V (adapter included)
Power Consumption: 35 mA
Temperature Operating Range: 5°C - 45°C
Outline Dimensions: 39 x 54 x 28 mm (W x L x H)
http://www.xsens.com/en/support/faq/mti_mtig_and_mtx.php#3.1
3 Sensor hardware Topics
3.1 Q: What are the measurement principles of the physical sensors in the MTi / MTx?
A: Rate of turn sensors (gyros):
MEMS, solid state, “vibrating structure" concept.
Linear accelerometers: MEMS, solid state, capacitative readout.
Magnetic field sensors: Thin-film magneto-resistive.
3.2 Q: What is the accelerometer range of the MTi / MTx?
A: The standard version of the MTx/MTi comes with 5g accelerometers (±50 m/s2 range). Full scales of 1.7g and 10g are available as well. Please, contact us at info@xsens.com if you need other specifications.
3.3 Q: Can I disconnect/connect the MTi / MTx as I please?
A: Yes. But keep in mind that for optimal accuracy the electronics of the MTi / MTx should be 'warmed up' for about 10-15 minutes.
3.4 Q: What kind of anti-aliasing (low-pass) filters does the MTx/MTi have?
A:What kind of anti-aliasing (low-pass) filters does the MTx/MTi have?
A: To avoid aliasing the MT uses low-pass (LP) filters on all inertial data channels (not on temperature and magnetometers). The filters used are effective second order and are available in different cut-off frequencies depending on your requirements. The standard MT is delivered with 40 Hz LP on the rate-of-turn sensors and 30 Hz LP on the accelerometers.
3.5 Q: Is there a USB version of the MTi / MTx?
A: The MTi and MTx are delivered with an Xsens USB Converter. The communication from sensor to USB Converter can be either RS-232, RS-422 or RS-485.
3.6 Q: What is the connector type on the MT inertial measurement unit (IMU)?
A: For the MTx the connector type is 'Binder 719'. For the MTi the connector type is ‘ODU L-series 7’. Pin-definitions are listed in the MTi and MTx User Manual. Please contact Xsens (info@xsens.com) and we will send you a copy.
3.7 Q: What are the pin definitions on the connectors (to save us buzzing the MT out)?
A:The pin-definitions are listed in the MTi and MTx User Manual. Please contact Xsens (info@xsens.com) and we will send you a copy.
3.8 Q: When you say that your MT samples at 100 Hz, does that mean that each sensor (accelerometers, gyroscope, etc.) is sampling at 100 Hz or that the total throughput is 100 Hz—i.e. that the true sampling rate is 100/number of sensors?
A: When we say 100 Hz we mean that each sensor channel is sampled at 100 Hz, so actually for the MT 10 channels of data (3D accelerometer, 3D rate of turn, 3D magnetometer and temperature) are transmitted at 100 Hz, some would call it 1000 Hz throughput.
3.9 Q: Is it possible to connect the MTx/MTi to a PocketPC?
A:Yes, most PocketPC's support standard RS232 input (mostly with supplied RS232 synch cable) so you can develop software for the PocketPC using binary data from the MTi or MTx or log the inertial data on the PocketPC (please contact us if you would like to receive a simple binary datalogger for the PocketPC).
Using the Xbus Master you can also easily connect to a PocketPC using Bluetooth.
firmware
http://webopedia.com/TERM/f/firmware.html
Software (programs or data) that has been written onto read-only memory (ROM). Firmware is a combination of software and hardware. ROMs, PROMs and EPROMs that have data or programs recorded on them are firmware.
http://en.wikipedia.org/wiki/Firmware
In computing, firmware is a computer program that is embedded in a hardware device, for example a microcontroller. It can also be provided on flash memory or as a binary image file that can be uploaded onto existing hardware by a user.
As its name suggests, firmware is somewhere between hardware and software. Like software, it is a computer program which is executed by a microprocessor or a microcontroller. But it is also tightly linked to a piece of hardware, and has little meaning outside of it.
http://terms.empas.com/dicsearch/view.html?i=3018166
①처리 과정 동안 컴퓨터에 의해 동적으로 변경이 불가능한 부류의 기억 장치에 적재된 컴퓨터 프로그램과 자료들.
②사용자 입장에서 변경할 수 없는 컴퓨터 프로그램과 자료가 들어 있는 하드웨어. 즉, 펌웨어에 들어 있는 컴퓨터 프로그램과 자료는 소프트웨어로 분류되고, 그 프로그램과 자료가 들어 있는 전기 회로는 하드웨어로 분류된다.
③읽기용 기억 장치(ROM)에 저장된 프로그램 명령어들.
④정상적인 동작을 하는 동안에는 변하지 않는, 기능적 개체를 구성하고 있는 컴퓨터 프로그램과 하드웨어가 1개의 단위로 이루어진 집합체. 그 하드웨어 단위에 저장된 컴퓨터 프로그램은 특정한 응용이나 작용에 맞는 요구를 만족시킬 고정된 논리 윤곽을 가진 집적 회로(IC)로서 저장된다.
'Hardware > sensors' 카테고리의 다른 글
| [월간 전자기술] 센서의 활용 (0) | 2008.08.02 |
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| myGyro300SPI (0) | 2008.08.02 |
| WSN (Wireless Sensor Network) (0) | 2007.01.19 |
| sensor terms (0) | 2007.01.19 |
| accelerometer 가속도 센서 - MMA7260Q datasheet (0) | 2006.12.14 |
http://en.wikipedia.org/wiki/Sensor_network
Sensor Web
http://en.wikipedia.org/wiki/Sensor_Web
invalid-file
OGC <Sensor Web Enablement Overview and High Level Architecture>
'Hardware > sensors' 카테고리의 다른 글
| [월간 전자기술] 센서의 활용 (0) | 2008.08.02 |
|---|---|
| myGyro300SPI (0) | 2008.08.02 |
| Motion Tracker MT9 (0) | 2008.07.28 |
| sensor terms (0) | 2007.01.19 |
| accelerometer 가속도 센서 - MMA7260Q datasheet (0) | 2006.12.14 |
an emerging field of information theory, called "compressive sensing," offered an alternative approach to conventional image acquisition and compression. Developed by researchers at Caltech, Stanford, the University of California, Los Angeles, and Rice, the technology is based on the idea that datasets, such as those that represent images or signals, often contain a significant amount of structure. When this structure is known, it can be used to extrapolate the image or signal when there's only a limited amount of available data. (ref. http://www.technologyreview.com/read_article.aspx?ch=specialsections&sc=personal&id=17610#)
digital micromirror technology
"The orientation of each mirror is random, which is important, say the scientists, because it provides the best possible sampling for the algorithm to reconstruct the image. The random structure is known and fed into the algorithm." (from http://www.technologyreview.com/read_article.aspx?ch=specialsections&sc=personal&id=17610#)
'Hardware > sensors' 카테고리의 다른 글
| [월간 전자기술] 센서의 활용 (0) | 2008.08.02 |
|---|---|
| myGyro300SPI (0) | 2008.08.02 |
| Motion Tracker MT9 (0) | 2008.07.28 |
| WSN (Wireless Sensor Network) (0) | 2007.01.19 |
| accelerometer 가속도 센서 - MMA7260Q datasheet (0) | 2006.12.14 |
'Hardware > sensors' 카테고리의 다른 글
| [월간 전자기술] 센서의 활용 (0) | 2008.08.02 |
|---|---|
| myGyro300SPI (0) | 2008.08.02 |
| Motion Tracker MT9 (0) | 2008.07.28 |
| WSN (Wireless Sensor Network) (0) | 2007.01.19 |
| sensor terms (0) | 2007.01.19 |