Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
nickarsow
User Rank
Rookie
re: Inertial measurement unit integrates accelerometer, gyro
nickarsow   5/31/2012 8:31:47 AM
NO RATINGS
Hi, A couple of questions: 1. Mechanical resonant frequency? 2. Interfaces? 3. Availability? Best regards Nick

R_Colin_Johnson
User Rank
Blogger
re: Inertial measurement unit integrates accelerometer, gyro
R_Colin_Johnson   5/26/2012 8:36:04 PM
NO RATINGS
One thing I forgot to spot-light but only mentioned in the story above, is that gyroscopes ordinarily burn battery power, because they use a resonator that has to be running full speed before the sensor works. However, Bosch has set-up its combo accelerometer/gyroscope chip so that the gyro, even though it is internal, can still be turned off by the accelerometer when the device is idle for a while.

R_Colin_Johnson
User Rank
Blogger
re: Inertial measurement unit integrates accelerometer, gyro
R_Colin_Johnson   5/26/2012 8:30:34 PM
NO RATINGS
Not only the bill-of-materials cost, but also the size of the device its used in can now be smaller.

Frederik Wegelin
User Rank
Rookie
re: Inertial measurement unit integrates accelerometer, gyro
Frederik Wegelin   5/26/2012 8:13:40 PM
NO RATINGS
I agree to everything above. In the long run combo sensors will prevail. As product manager at Bosch Sensortec I strongly believe that Bosch Sensortec's strong MEMS integration competence paired with holding the key MEMS technologies and the sensor data fusion know-how in-house is an inherent advantage. The picture above shows the eCompass BMC050, a 6-axis device consisting of a state-of-the-art 3-axis accelerometer and a high performance 3-axis geomagnetic sensor. It is another example for Bosch defining the standard for the smallest footprint.

elctrnx_lyf
User Rank
Manager
re: Inertial measurement unit integrates accelerometer, gyro
elctrnx_lyf   5/26/2012 12:29:25 PM
NO RATINGS
This integration could easily help the OEM's to bring down the cost in the final products.

R_Colin_Johnson
User Rank
Blogger
re: Inertial measurement unit integrates accelerometer, gyro
R_Colin_Johnson   5/25/2012 5:45:06 PM
NO RATINGS
Yes, dead reckoning in navigators like Garmin when GPS is blocked will be one application, and Bosch supplies the sensor fusion software to make that happen. However, the higher-volume usage, Bosch hopes, will be in replacing with this single chip the separate chips for accelerometer and gyroscope in smartphones and tablets like the iPhone and iPad.

jnissen
User Rank
Manager
re: Inertial measurement unit integrates accelerometer, gyro
jnissen   5/25/2012 2:17:30 PM
NO RATINGS
Exactly Les. Inertial navigation would be significantly easier. I can see lots of products being helped out especially small micro drones and radio control craft of all sorts. Could be used to track items or people beyond the reach of GPS (for good or bad).

Les_Slater
User Rank
CEO
re: Inertial measurement unit integrates accelerometer, gyro
Les_Slater   5/24/2012 8:40:33 PM
NO RATINGS
Seems like this technology could supplement GPS satellite signal to keep navigation on track in event of signal loss or distortion.

R_Colin_Johnson
User Rank
Blogger
re: Inertial measurement unit integrates accelerometer, gyro
R_Colin_Johnson   5/24/2012 6:00:03 PM
NO RATINGS
I forgot to mention that Invensense also already has the holy-grail of inertial navigation--a complete nine-axis inertial navigation unit (INU) that includes an AKM magnetometer along with its own six-axis combo chip with accelerometer+ gyro (IMU): http://www.eetimes.com/electronics-news/4234028/Invensense-tips-single-chip-inertial-navigation-unit Also Bosch has a eCompass, a six-axis accelerometer plus magnetometer of its own design: http://www.eetimes.com/electronics-news/4230344/MEMS-on-parade-at-Executive-Congress And its only a matter of time until Bosch, and STMicroelectronics for that matter, release complete nine-axis INUs too.

R_Colin_Johnson
User Rank
Blogger
re: Inertial measurement unit integrates accelerometer, gyro
R_Colin_Johnson   5/24/2012 5:34:23 PM
NO RATINGS
Bosch is not the first to integrate a gyroscope and an accelerometer onto the same chip. Combo chips are already available from Invensense: http://www.eetimes.com/electronics-news/4210545/MEMS-gyro-accelerometer-combo-chip-debuts However, Bosch's manufacturing muscle as the world volume leader in MEMS worldwide may attract mainstream smartphones since it takes the place of separate chips for accelerometer and gyroscope. STMicro, which supplies the iPhone today, has a combo chip with three-axis accelerometer and two-axis gyroscope, that it sells to Movea for its pointing TV remote controls: http://www.eetimes.com/electronics-news/4086665/Gyroscope-and-accelerometer-share-MEMS-package However, today Apple smartphones and tablets still use separate accelerometer and gyroscope chips, both from STMicroelectronics.



Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Are Today's Designs Bound by the Constraints of Yesteryear?
Max Maxfield
21 comments
As part of my ongoing Pedagogical and Phantasmagorical Inamorata Prognostication Engine project (try saying that 10 times quickly), I'm working with Jason Dueck from Instrument Meter ...

Jolt Judges and Andrew Binstock

Jolt Awards: The Best Books
Jolt Judges and Andrew Binstock
1 Comment
As we do every year, Dr. Dobb's recognizes the best books of the last 12 months via the Jolt Awards -- our cycle of product awards given out every two months in each of six categories. No ...

Engineering Investigations

Air Conditioner Falls From Window, Still Works
Engineering Investigations
2 comments
It's autumn in New England. The leaves are turning to red, orange, and gold, my roses are in their second bloom, and it's time to remove the air conditioner from the window. On September ...

David Blaza

The Other Tesla
David Blaza
5 comments
I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...