Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!sri-spam!ames!oliveb!felix!fritz!dennisg From: dennisg@fritz.UUCP Newsgroups: sci.electronics Subject: Re: Ultrasonic Distance Measurement Message-ID: <3871@fritz.UUCP> Date: Fri, 13-Mar-87 21:55:11 EST Article-I.D.: fritz.3871 Posted: Fri Mar 13 21:55:11 1987 Date-Received: Sat, 14-Mar-87 15:10:58 EST References: <8455@aero.ARPA> <3858@fritz.UUCP> Sender: root@fritz.UUCP Reply-To: dennisg@fritz.UUCP (Dennis Griesser) Organization: FileNet Corp., Costa Mesa, CA Lines: 77 Here's the bibliography of ultrasonic detection/ranging projects that I promised yesterday. I would appreciate seeing other references. o "An Ultrasonic Ranging System, Build the SonarTape" by Steve Ciarcia Byte, October 1984, pg 113 Notes: Uses Polaroid transducer and TI control module (combo costs about $60). Interfaced to LSI display driver and LCD display. o "Home In on the Range! An Ultrasonic Ranging System" by Steve Ciarcia Byte, November 1980, pg 32 Notes: Uses Polaroid Ultrasonic Ranging System Designer's kit ($125). Interfaced to computer via parallel port (BCD). Internal details of the ranging module are presented. The ranging transducer is mounted on a computer-controlled stepper motor assembly. See Byte, November 1978, page 76. o "Ask Byte" by Steve Ciarcia Byte, November 1980, pg 266 Notes: Uses individual ultrasonic transmitter and receiver circuits. Two transmitters are provided: one just a 555, and the other a 555 driving a LM1812. The receiver is an NE567 phase-locked loop. o "Ask Byte" by Steve Ciarcia Byte, June 1982, pg 266 Notes: Same circuits as Byte, November 1980, pg 266. o "Sonic Motion Detector" by David Benzel Radio Electronics, September 1984, page 51 Notes: Detects motion by doppler shift of continously operating transmitter. Receiver requires numerous OP-amps, and discrete components. o "The Electronic Scientist" by Forrest Mims Computers and Electronics, June 1983, page 84 Notes: Uses Polaroid Ultrasonic Ranging System Designer's kit ($150). Few details about the internals of the rangefinder module are presented. Author adds an audible output that makes low-pitched thumps for nearby objects and high-pitched chirps for distant ones. o "LM1812 Data Sheet" National Semiconductor Linear Databook, 1982, page 9-77 Notes: A one-chip solution for many ultrasonic detection and ranging needs. Provides schematic of an ultrasonic ranging system that spans 4 inches to 6 feet in air: one chip, two coils, three resistors, 8 capacitors, and a transducer. Adding a 555 and some minor components yields a range of 3 feet to 20 feet. The coils used appear to be strange, and perhaps hard to find. Also included is schematic of 200 kHz depth sounder spanning 5 feet to 100 feet in water. o "AB-20 Application Brief" National Semiconductor Linear Applications Databook, 1986, page 1083 by Mitchell Lee Notes: Provides schematic of an ultrasonic ranging system that spans 4 inches to 30 feet: one chip, two coils, four resistors, 8 capacitors, 2 transistors, three diodes, and a Polaroid transducer. One coil has a strange part number, but specs are provided. The other is a transformer that you wind yourself from standard parts. Also included is some juicy technical information, like a note that piezoelectric transducers "ring" for as long as 20 msec (masking up to 10 feet of range)! o "Judging Distance" "Microprocessor Based Robotics", page 95 by Mark Robillard Notes: Provides several simple ultrasonic circuits: 555-based transmitter, NE567-based receiver (741 or discrete pre-amp). Also shows a ranging circuit based on the LM1812: one chip, two coils, five fixed resistors, two pots, 8 capacitors, and a transducer. Adding a 555 and some minor components increases the range. The coils used are standard "Miller" parts, and should be fairly easy to find.