HMR3500

Download HMR3500 .PDF

3236358 Downloads

5.91 MB .pdf

125 inch nylon spacers to stand off the board from the mounting surface. The baud rate can be changed by command after initial communication at the current baud rate. TruePoint™ Compass Module HMR3500 The HMR3500 TruePoint™ compass module is a 3-axis digital compass solution with a customizable coordinate system for mounting in any desired orientation. One available serial port is required for communicating with the compass. 1° Resolution 4 Tilt-Compensated 4 ±89° Pitch and Roll, 360° Continuous Roll Capabilit 4 Update Rate to 25Hz 4 Rapid Heading Computations for Guidance Applications 4 Compact Solution in a 1. PHYSICAL CHARACTERISTICS The circuit board for the HMR3500 is 1. Further HMR3500 interface commands and protocol are in the HMR3500 user’s guide document. Heading computation uses the magnetic and tilt information inputs after compensation for errors. A demonstration kit of the HMR3500 is available with the case, cable assembly, a CD of the CompassHost windows utility software for the user’s personal computer. Lack of a blinking LED or at a rapid rate is an indication of an error, and action should taken to cycle power on the compass electronics to reset the module. 52 inches and composed of multi-layer, fiberglass-epoxy printed boards, with the main board horizontal and a vertical board for mounting the z-axis magnetic sensor and accelerometer. From the basic magnetic heading, a declination value may be added to arrive at a geographic north referenced heading. The HMR3500 has provisions for hard and soft-iron correction algorithms to handle magnetic distortion effects. The CompassHost utility software is a 32-bit Windows® application program that is provided with the HMR3500 demonstration kit, and can be used to evaluate the HMR3500’s performance and demonstrate the compass features. It can display all messages received from the module in the main window with scrolling text. An index offset value may also be added to correct for mechanical installation misalignment on the target platform. By feeding 5 volts at about 50 milli-amperes into the HMR3500, the compass will operate, and a red LED on the printed circuit board assembly will begin blinking at a 1Hz rate. com HMR3500 PIN CONFIGURATION Pin Number Pin Name 1 Ground 2 RXD RS-232 Receive Data 3 TXD RS-232 Transmit Data 4 +Vin 5 Ground Description Power Supply Return and Ground Reference Positive Power Supply Voltage Input Ground Reference (for twisted pair routing with +Vin) BASIC DEVICE OPERATION The HMR3500 TruePoint™ Compass Module includes 3-axis Anisotropic Magneto-Resistive (AMR) sensors, 3-axis MEMS accelerometers, a temperature sensor, and 16-bit microprocessor with onboard Analog to Digital Converter (ADC). TEST SOFTWARE DESCRIPTION Computer test software is provided in the HMR3500 demonstration kit that will permit a thorough evaluation and demonstration of the compass capabilities. The interface hardware protocol is RS-232 without any further handshaking or hardware control lines