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Table of Contents
Related Manuals for Memsic AHRS500GA Series
Summary of Contents for Memsic AHRS500GA Series
- Page 1 Powerful Sensing Solutions for a Better Life AHRS500GA Series OPERATORS MANUAL Document Part Number: 7430-0060-09 Rev A MEMSIC, Inc., 1759 McCarthy Blvd, Milpitas, CA 95035 Tel: 408-964-9700, Fax: 408-854-7702 email: infoca@memsic.com, website: www.memsic.com...
- Page 2 ©2010 MEMSIC, Inc. All rights reserved. Information in this document is subject to change without notice. MEMSIC and SoftSensor are registered trademarks and AHRS500GA-[] is a trademark of MEMSIC, Inc. Other product and trade names are trademarks or registered trademarks of their respective holders.
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Page 3: Table Of Contents
AHRS500GA-[] Series Operator’s Manual Table of Contents Introduction....................................1 The AHRS500GA-[] Series Motion and Attitude Sensing Units..................1 Package Contents..................................1 AHRS500GA-[] Description ..............................2 AHRS500GA-[] Coordinate System...........................2 Connections ..................................2 3.2.1 I/O Cable..................................3 3.2.2 Power Input and Power Input Ground ........................3 3.2.3 Case Ground ................................3 3.2.4 Serial Data Interface ..............................3 3.2.5... - Page 4 AHRS500GA-[] Series Operator’s Manual 8.3.3 Sealing the Container ..............................13 8.3.4 Marking..................................13 8.3.5 Return Shipping Address ............................14 Warranty ...................................14 Appendix A. Mechanical Specifications...........................15 Appendix B. AHRS500GA-[] Output Quick Reference .......................17 Appendix C. Velocity Input Packet Format ..........................18 Doc# 7430-0060-09 Rev. A Page iv...
- Page 5 AHRS500GA-[] Series Operator’s Manual About this Manual The following annotations have been used to provide additional information. NOTE Note provides additional information about the topic. EXAMPLE Examples are given throughout the manual to help the reader understand the terminology. IMPORTANT This symbol defines items that have significant meaning to the user WARNING The user should pay particular attention to this symbol.
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Page 7: Introduction
See Table 3 for the serial interface for each AHRS500GA-[] model. Data is streamed continuously. MEMSIC AHRS500GA-[] units employ onboard digital processing to compensate for deterministic error sources within the unit and to compute attitude information. The AHRS500GA-[] units accomplish these tasks with an analog to digital converter and high performance Digital Signal Processors. -
Page 8: Ahrs500Ga-[] Description
AHRS500GA-[] Series Operator’s Manual AHRS500GA-[] Description AHRS500GA-[] Coordinate System The AHRS500GA-[] uses the following coordinate system. With the connector facing you, and the mounting plate down, the axes are defined as: X-axis – from face with connector through the AHRS500GA Y-axis –... -
Page 9: I/O Cable
AHRS500GA-[] Series Operator’s Manual Common mode input voltage range: 3VDC wrt power ground. RS-422 Receive + A RS-422 Receive – A Case Ground Electrically connected to I/O connector shell 3.2.1 I/O Cable The user must provide a shielded cable with the shield connected to the I/O connector shell in order to provide the required EMI protection. -
Page 10: Bit Status Output Pin
AHRS500GA-[] Series Operator’s Manual Table 3 Supported BAUD Rates and Output Rates Model : Interface BAUD Output Connector Rate Rate Facing AHRS500GA -200 RS-232 38400 -201 RS-232 38400 FORWARD -202 RS-232 9600 -203 RS-232 9600 FORWARD -204 RS-232 9600 -205 RS-232 9600 FORWARD... -
Page 11: Measurements
AHRS500GA-[] Series Operator’s Manual Measurements The AHRS500GA-[] Series is designed to operate as a complete attitude and heading reference system. See the “Data Packet Format” section for the actual structure of the data packet. 3.3.1 Attitude and Heading The AHRS500GA-[] acts as a complete attitude and heading reference system and outputs the stabilized pitch, roll, and yaw angles along with the angular rate, acceleration, and magnetic field information. -
Page 12: Commands
AHRS500GA-[] Series Operator’s Manual permanently on. Reserved Power Failure 0: No power failure 1: A power loss has been detected and the system is running on back-up power. Power loss will occur within 200 msec. Comm Error 0: No serial port communication failure has been detected. 1: A serial port communications failure has been detected such as overrun, parity. -
Page 13: Data Packet Format
AHRS500GA-[] Series Operator’s Manual Data Packet Format In general, the digital data representing each measurement is sent as a 16-bit number (two bytes). The data is sent MSB first then LSB. Table 5 AHRS500GA-[] Series Data Packet Format Byte Data Header (0xAA) Header (0x55) Roll Angle (MSB) -
Page 14: Magnetic Heading
AHRS500GA-[] Series Operator’s Manual In some applications, using the AHRS500GA-[]’s digital output requires a precise understanding of the internal timing of the device. The processor internal to the AHRS500GA-[] runs in a loop - collecting data from the sensors, processing the data, and then collecting more data. -
Page 15: Ahrs500Ga-[] Operation
AHRS500GA-[] Series Operator’s Manual AHRS500GA-[] Operation Normal Operation The AHRS500GA-[] is configured to output data continuously when power is applied. The AHRS500GA-[] does not recognize any input serial commands. A magnetic alignment process must be completed before use of the AHRS500GA-[]. See the AHRS500GA-[] Installation Manual for specific instructions. -
Page 16: Viewing Ahrs500Ga-[] Data With Gyroview
AHRS500GA-[] Series Operator’s Manual Viewing AHRS500GA-[] Data with GyroView MEMSIC includes GyroView software to allow you to directly view the AHRS500GA-[] data. GyroView Computer Requirements The following are minimum capabilities that your computer should have to run GyroView successfully: •... -
Page 17: Take Measurements
AHRS500GA-[] Series Operator’s Manual Take Measurements Once you have configured GyroView to work with your AHRS500GA-[], pick what kind of measurement you wish to see. “Graph” will show you the output you choose as a strip-chart type graph of value vs. time. “FFT” will show you a real-time Fast- Fourier transform of the output you choose. -
Page 18: Ahrs500Ga-[] Installation
AHRS500GA-[] Series Operator’s Manual AHRS500GA-[] Installation Refer to the AHRS500GA-[] Installation Manual (Doc# 7410-0001-08) for detailed mounting instructions for the AHRS500GA- Doc# 7430-0060-09 Rev. A Page 12... -
Page 19: Warranty And Support Information
Identification and Protection If the equipment is to be shipped to MEMSIC for service or repair, please attach a tag TO THE EQUIPMENT, as well as the shipping container(s), identifying the owner. Also indicate the service or repair required, the problems encountered, and any other information considered valuable to the service facility such as the list of information provided to request the RMA number. -
Page 20: Return Shipping Address
Return Shipping Address Use the following address for all returned products: MEMSIC, Inc. 1751 McCarthy Blvd. Milpitas, CA 95035 Attn: RMA Number (XXXXXX) Warranty The MEMSIC product warranty is one year from date of shipment. Doc# 7430-0060-09 Rev. A Page 14... -
Page 21: Appendix A. Mechanical Specifications
AHRS500GA-[] Series Operator’s Manual Appendix A. Mechanical Specifications Refer to the AHRS500GA-[] Installation drawing, 7420-0001-01, below for the mechanical specifications. 7420-0001-01 Doc# 7430-0060-09 Rev. A Page 15... - Page 22 AHRS500GA-[] Series Operator’s Manual Doc# 7430-0060-09 Rev. A Page 16...
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Page 23: 10 Appendix B. Ahrs500Ga-[] Output Quick Reference
AHRS500GA-[] Series Operator’s Manual 10 Appendix B. AHRS500GA-[] Output Quick Reference 10 is the G-range of the accelerometers. This is the default maximum range of the accelerometers. 800 is the rate range of the rate sensors. This is the default maximum range of the gyros. Digital Output Conversion Data is sent as 16-bit signed integer. -
Page 24: 11 Appendix C. Velocity Input Packet Format
AHRS500GA-[] Series Operator’s Manual 11 Appendix C. Velocity Input Packet Format (For AHRS500GA-22x models and higher) The following table describes the external aiding data packet format that is supported by the AHRS500GA-22x models (and higher) via serial communication over the RS232 port. This data is sent over RS-232 port at 9600 baud, 8 data bits, no parity and 1 stop bit at the rate of 1 Hz. - Page 25 MEMSIC, Inc. 1751 McCarthy Blvd, Milpitas CA 95035 Phone: 408.965.3300 Fax: 408.324.4840 Website: www.memsic.com...
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