Home > Products > Electronic product solution development > Bluetooth module singlechip Program development
Bluetooth module singlechip Program development
- 9999999 Piece / Pieces per Month
- T/T L/C D/P D/A Credit Card PayPal Cash Escrow
- AIRPODS MAX (2020)
- Pen tablet painting graphic design pen monitor BOSTO X5 120% sRGB color full-laminated screen battery-free drawing tablet
- Factory wholesale 1280*720 lcd led poratble home theater projector Y7
- Top on sale 720p hd smart android projector HY300
- Camera Interface for Mecedes-Benz NTG 6.0,7" screen, A class
- Hot Sale Wireless Speaker Mini Waterproof Speakers Music Players With Handsfree Call Tf Card For Mobile Phone
Product Details
Brand Name: | SSR | Place of Origin: | China | Model Number: | Bluetooth module singlechip Program development |
Product Description
How many sensors are used in mobile phones? What are their characteristics?
Do you know how many sensor combinations are used in the compass system of mobile phones? Since Android 5.0, compass system has been adding other sensors to the direction sensor. So far, the compass is not disturbed. More and more sensors are used in the compass, including these sensors. Do you know? What are the characteristics of these sensors?
sensor
1. Acceleration sensor
Acceleration sensor, also known as G-sensor, obtains the acceleration value of X, y, Z three axes.
This value includes the influence of gravity in M / S ^ 2.
Place the phone flat on the desktop. The default value of X axis is 0, Y axis is 0, and Z axis is 9.81.
Place the phone face down on the desktop, and the z-axis is -9.81.
The acceleration sensor may be the most mature MEMS product, and there are many kinds of acceleration sensors in the market. The commonly used acceleration sensors in mobile phones include Bosch BMA series, AMK 897x series, St lis3x series, etc. These sensors generally provide an acceleration measurement range of ± 2G to ± 16g, which are connected with MCU by I2C or SPI interface, and the data accuracy is less than 16bit.
2. Magnetic sensor
The magnetic sensor is called m-sensor for short, which returns the environmental magnetic field data of X, y and Z axes.
The unit of this value is micro Tesla, expressed in UT. It can also be Gauss, 1tesla = 10000 Gauss.
Generally, there is no independent magnetic sensor in hardware, and magnetic data is provided by electronic compass sensor (e-compass). The electronic compass sensor not only provides magnetic sensor data, but also provides direction sensor data.
3. Direction sensor
The direction sensor is called o-sensor for short. It returns the angle data of three axes. The unit of direction data is angle.
As mentioned above, after obtaining the data of G-sensor, e-compass calculates and produces o-sensor data and m-sensor data.
The o-sensor provides three data: azimuth, pitch and roll.
Azimuth: azimuth, the angle between magnetic north pole and Y axis when returning to horizontal, ranging from 0 ° to 360 °. 0 ° = north, 90 ° = east, 180 ° = south, 270 ° = west.
Pitch: the angle between the x-axis and the horizontal plane, ranging from - 180 ° to 180 °. When the Z-axis and y-axis rotate, the angle is positive.
Roll: the angle between the Y-axis and the horizontal plane, ranging from - 90 ° to 90 ° for historical reasons. When the x-axis and z-axis move, the angle is positive.
The electronic compass needs to be calibrated before obtaining the correct data, usually using the 8-word calibration method. In principle, the normal direction of the device should be pointed to all eight quadrants of the space.
4. Gyroscope sensor
The gyroscope sensor, called gyro sensor, returns angular acceleration data of X, y and Z axes.
The unit of angular acceleration is radians / second.
According to the actual measurement of nexus s mobile phone:
Rotate horizontally counter clockwise, and the Z axis is positive.
Rotate counterclockwise horizontally, and the z-axis is negative.
Rotate to the left, and the y-axis is negative.
Rotate to the right, and the y-axis is positive.
If you rotate up, the x-axis is negative.
Rotate downward and the x-axis is positive.
5. Gravity sensor
The gravity sensor is called GV sensor for short, which outputs gravity data.
On earth, gravity is 9.8 in M / S ^ 2.
The coordinate system is the same as the acceleration sensor.
When the equipment is reset, the output of gravity sensor is the same as that of acceleration sensor.
6. Linear acceleration sensor
Linear acceleration sensor is referred to as La sensor.
Linear acceleration sensor is the data obtained by the acceleration sensor minus the influence of gravity.
The unit is m / S ^ 2. The coordinate system is the same as the acceleration sensor.
The calculation formulas of acceleration sensor, gravity sensor and linear acceleration sensor are as follows:
Acceleration = gravity + linear acceleration.
7. Rotating vector sensor
The rotation vector sensor is called RV sensor for short.
The rotation vector represents the direction of the device and is a data obtained by mixing coordinate axes and angles.
RV sensor outputs three data:
x*sin(theta/2)
y*sin(theta/2)
z*sin(theta/2)
Sin (theta / 2) is the order of magnitude of RV.
The RV is oriented in the same direction as the axis rotation.
The three values of RV and COS (theta / 2) form a quad.
RV data has no units and uses the same coordinate system as the acceleration.
give an example:
sensors_ event_ t.data[0] = x*sin(theta/2)
sensors_ event_ t.data[1] = y*sin(theta/2)
sensors_ event_ t.data[2] = z*sin(theta/2)
sensors_ event_ t.data[3] = cos(theta/2)
The values of GV, La and RV can not be directly given by physical sensors, which need to be calculated by the algorithm of G-sensor, o-sensor and gyro sensor.
Contact Us
- Shenzhen Sounds of Lucky Electronics and Technology Co.LTD
- Contact nameFang
- Addressbaoanqu Shenzhen,Guangdong
Electronic product solution development |
- BLIIOT MQTT protocol connected to cloud platform, edge computing control, waste gas sewage pipeline pressure flow, distribution cabinet room temperature and humidity remote acquisition and monitoring coupler
- BLIIOT profinet analog digital input and output logic control traffic agriculture, smart medical environment, monitoring coupler BL201
- BLIIOT MCU controller 8TC+1RS485 high-precision acquisition of various types of thermocouple acquisition module
- BLIIOT Modbus RTU 4AIN+4PT100+1RS485 custom humidity monitoring module DAM124 for dry contact
- BLIIOT transmitter, current, voltage, temperature and power 2AIN+2PT100+1RS485 I/O acquisition module
- BLIIOT 4PT100+1RS485 cold storage fruit and vegetable storage room temperature monitoring remote acquisition module dam120
- BLIIOT 2PT100+1RS485Modbus RTU protocol wet and dry contact pulse counting remote I/O module
- BLIIOT 4AIN+1RS485 to DCS PLC SCADA IoT Industrial Automation Acquisition Device DAM116
- BLIIOT 2AIN analog input 1RS485 water room computer room environmental security temperature and humidity acquisition and monitoring module
- G805 Low Power BLE + CatM(eMTC,LTE-M) or 4G Cat.1, GPS/Glonass+Wifi+LBS Badge Tracker
- B2315 LoRaWAN + BLE5.0, GPS tracker wristband
- W200PL-LoRaWAN+BLE5.0,IP67 Waterproof, GPS+Glonass+Wifi, Heart Rate+Body Temp. Tracker Wristband/ Smart Watch
- W200L-LoRaWAN+BLE5.0,GPS+Glonass+Wifi, Heart Rate+Body Temp. Tracker Wristband/ Smart Watch
- G618M-CatM-eMTC+BLE, GPS+Wifi low power Pets Tracker
- Wearable and Tracker (Indoor and Outdoor)
- 100m Type C Wireless Display Video Transmitter Receiver HDMI Extender for Macbook Notebook Laptop PC Ios Phone To TV Projector
- 5.8Ghz Wireless HDMI Video Transmitter and Receiver 250M Wireless HDMI Extender kit for DSLR Laptop STB PC To Monitor TV
- Wireless HDMI Transmitter and Receiver 300M Video Extender kit Lollipop Antenna For DSLR Camera PS4 to Projector PC
- 5.8Ghz 200M Wireless HDMI Extender Video Transmitter Receiver 1 To 4 Splitter Screen Share for PS4 DVD Camera PC To TV Monitor
- Wideband SDR Receiver RSP1A 1kHz - 2000Mhz 14bit shortwave Radio AM FM HF SSB CW receiver Full band
- MR500E industrial grade 4G router with full network connectivity, 4G to WIFI wired video monitoring, internet access, CPE router
- 36V2.2Ah HA007-Electric Skateboard Electric Scooter Replacement Battery Pack With Domestic 18650 2200mah And BMS
- new s8 smart wearable watch
- Professional Factory 51.2mm Voice Coil Titanium Unit Diaphragm for Compression Driver Tweeter
Popular Searches
- heartbeat recording device
- record brush cleaner
- wireless presenter with green laser
- pcmcia graphics card
- dab pen wax
- spectacles wet wipe
- Hdmi Wallplate Extender
- motion sensor sound player
- landline phone adapter
- vinyl record cleaner
- aaa aa c d 9v
- desulfation battery charger
- adulte movie
- ais usb receiver
- android ball
- audio cube
Find Similar Products By Category
- Consumer Electronics > Other Consumer Electronics
- Buy on GoldSupplier.com
- How to Buy
- Browse by Catagories
- Browse by Hot Regoins
- Private Sourcing Events
- Sell on GoldSupplier.com
- How to Sell
- Post Products
- Manage Products
- Manage Groups
- About
- About Us
- Link to Us
- Contact Us
- Sitemap
- Please Enter your Email Address
- Please enter the content for your inquiry.
We will find the most reliable suppliers for you according to your description.
Send Now-
Fang
Welcome to my shop! Glad to serve you!Please send your question!
Your message has exceeded the limit.
Your message has exceeded the limit.
-
-
Your inquiry content must be between 20 to 5000 characters.Send Now.
-
Please input the mailbox.
-