M P H SDRR-K01 Doppler Shift Radar Device User Manual 990947 r

M P H Industries Inc Doppler Shift Radar Device 990947 r

Manual

™ Industries DS4™ Speed, Direction, & Range Sensing Radar Specifications And User’s Guide Copyright 2005, MPH Industries, Inc. No part of this work, covered by the copyrights hereon, may be reproduced or copied in any form or by any means – graphic, electronic, mechanical, including photocopying, taping, or information storage and retrieval systems – without the written permission of MPH Industries, Inc.
2 I. DS4 Description and Operation The MPH Industries, Inc. DS4 Radar Sensor is designed for DOT agencies to measure the speed, direction, and range of motor vehicles and communicate via RS-232 to a PC, data logger or some other data storage or display device. The DS4 reports the target vehicle’s velocity (speed and approaching or receding direction) and range of the strongest reflected signal. The DS4 utilizes the legally accepted microwave doppler shift principle and has performance characteristics compliant for use under Part 15 of the US FCC regulations and with the European RTTE harmonized standards for this class of equipment. The DS4 is a self contained module consisting of a Gunn oscillator transmitter, a transmit and receive antenna, and an integral signal processing unit. It is housed in a NEMA type enclosure with one eight pin circular connector through which all of the power and communications pass. Cable termination configurations include “flying leads” and a DB9 type of connector. The module is not waterproof, but can be modified to use for outside locations in a fixed mounting configuration with the addition of a sealed radome over the antennas. The DS4 standard configuration outputs the strongest approaching target within a preset range of 600 feet. Special configurations with ranges up to 1000 feet can be made with variations in the software modules installed at the time of manufacture, but field change in configuration is not an option. A. SYSTEM SPECIFICATIONS Power Requirements & Voltage: 10.8 Vdc-16.5 Vdc (13.6 Vdc Nominal) Low Voltage Brown-out: Input voltage 7.0 < Vinput < 10.8 VDC: Transmitter disabled and Low Voltage status bit enabled Input voltage < 7.0 entire unit disabled. Current: 0.25A nominal @ 13.6V input voltage Target Detection Speed: 6 to 110 mph (10 to 193 km/h) Speed Accuracy: +/- 1 mph (+/- 2 km/h) Target Range: <= 1000 feet (328 meters) Range Accuracy: +/- 30 feet (+/- 9 meters) Operating Temperature Range: -30°C (-22°F) to 60°C (+140°F) Operating Humidity Stability: Operates normally up to at least 90% relative humidity at 99°F (37°C).
3B. PHYSICAL CHARACTERISTICS Connector: 8 Pin Circular Weather tight Physical Size: Weight = 3.0 lb. (1.36 kg) Depth = 2.5" (6.4cm) Width = 6.0" (15.2 cm) Height = 8.75" (22.2 cm) C. MICROWAVE CHARACTERISTICS The DS4 unit has separate transmit and receive antennas. The transmit antenna has a broad beam width and illuminates targets in a wide field. Operating Frequency: K band: 24.15 GHz Modulation: Square wave 48.25 KHz., +/- 100 KHz deviation peak Microwave Source: Varactor tuned Gunn cavity oscillator Output Power: Nominal 12-18 mW / Maximum 20 mW Radiated Power Density: < 100 mw EIRP Transmit Antenna: Linear Polarization, vertical E field Beam Width: 40 deg. Horiz. , 70 deg. Vert. Gain: + 6 dBi Received Microwave Beam: Linear Polarization, vertical E field Beam Width: 20 deg. Horiz., 30 deg. Vert. Gain: +17 dBi Detection Range: 1000 ft. typical for average size vehicle. Range varies by size of vehicle, terrain, traffic conditions, weather conditions, and other external conditions present in various locations. This device complies with Part 15 of FCC rules. Moduification of this device without the express consent of the manufacturer may invalidate the user's right to operate the device.This device complies with Part 15 of the FCC Rules subject to the following two conditions:1) This device must not cause harmful interference and,2) This device must accept all interference, including interference that may cause undesired operation.RF Exposure Warning: A minimum separation distance must be maintained between the user and the radiating antenna. Failure to maintain this minimum separation distance may cause the device to operate in excess of the rf exposure levels required by FCC Rules and should be avoided.
4MPH DS4 Radar Interface Protocol Document 1. Speed Packet Protocol The DS4 Radar message packet consists of 7 bytes @ 1200 baud, no parity, 8 data bits, 1 start bit. Messages are paced at 250mS intervals and are sent whether there is a target or not. Char Description 1 <STX> Start of message 2 Status Radar status, as defined below 3 Not used 4 Approaching Target Speed values below 4 are treated as zero. 5 Reserved 6 Target Range/10 Values below 4 are treated as zero 7 <ETX> End of message 1.1. Radar status byte Bit Description/function if set 0 Low voltage error 1 Not used 2 Not used 3 Not used 4 Not used 5 Always zero 6 Always zero 7 Always set 1.2. Example Received sequence 02, 128(0x80), 01, 65, 01, 55, 03. Strongest approaching target at 65 at a range of 550 feet.
5 2. Recommendations for remote displays (sign boards) or data loggers. • Look at the Approaching Target byte. If it is 4 or above, display it. • If messages are not arriving, blank screen after a few seconds. The radar is probably off, or not connected. • Displaying the difference between the sign receiving a speed of zero and not receiving a message at all is recommended. This makes troubleshooting easier. We display a dot if communications are working properly. 3. Pin out Description Following is the pin out for the DS4 circular output connector (male bulkhead connector on the module) with the mating cable wire colors: Pin Description Cable Wire Color 1 +13.6 VDC Input Red 2 OFF/ (Gnd to turn unit off) White 3 RS232 Rec Line (not used) Blue 4 RS232 Trans Line Brown 5 Signal Gnd Green 6 No Connection Orange 7 No Connection Yellow 8 Power Ground Black DS4 CONNECTOR PIN DEFINITIONGuide Key0 12345678
6 MPH INDUSTRIES, INC. A SUBSIDIARY OF MPD, INC. 316 EAST NINTH STREET OWENSBORO, KY 42303 1-888-689-9222 FAX: (270) 685-6288 HOURS: MONDAY-FRIDAY 8:00AM – 4:30PM (Central Time Zone) Part No. 990947, Rev - Date: May 2005

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