Sonar Ranging Module
SRM400
The SRM400 is a sonar ranging module
utilizing our new developed Sonar Ranging IC,
PW-0268, which can work with all our PT or
EP type transducers. SRM400 provides as a
shortcut to develop car reversing systems or
some other distance measurement systems for
design engineers who are not very familiar
with analog circuit and/or the operation of
ultrasonic transducers. By using this module
engineers can focus firstly on the other fields of
digital circuit and software designs as well as
some other mechanical issues. After first stage
then you can either design your own analog
circuit based on the module construction or
consult with factory for making your own
module for your special needs.
Specification:
Operation voltage
Operation current
Oscillation frequency Variable RC oscillator
Amplifier gain
DC6 - 10V
<20 mA ＠DC10V
Pre-Amplifier
14 dB
2nd Stage Amplifier 30 dB
Time controlled 32 35 dB max.
steps main
Features:
z
z
Operating Voltage: 6 – 10Vdc single source
Operating Frequency: broadband output
amplifier
Bandpass filter
Fc: 38 KHz
ranging up to 250KHz
Bandwidth: 20KHz
Insertion loss: 1 dB
130Vpp;
z
z
z
z
Built-in variable RC oscillator matching
transducers with different frequencies
High Gain Amplifier: varies with time over
32 steps
Integrated Band Pass Filter: reduces
external component count,
Bi-direction I/O Pin: simplifies the control
function for transmitting a pulse and
receiving an echo
An adjustable System Clock: enables the
control of, the number of pulses transmitted,
the slope of the variable gain amplifier, and
the pulse repetition rate
Driving voltage
(no load)
Bi-directional I/O
pulse width 0.5ms
Input signal Open collector pull low
Output 0..05*Vcc to 0.9*Vcc
digital echo signals
Measuring distance
25 – 150 cm
SRM400 includes:
1. Module board
z
z
2. 400EP14D enclosed type transducer of
asymmetrical beam patterns, see detail
specification of 400EP14D.
3. Detail electrical schematic
Board size: 27.9 * 18 mm (L*W)
S. Square Enterprise Company Limited
Pro-Wave Electronics Corporation
P.O. Box 1-70 Chung Ho, Taiwan, ROC; E-mail: prowave@ms3.hinet.net; Tel: 886-2-22465101(5 lines), 22459774; Fax: 886-2-22465105
http://www.s2.com.tw ; http://www.prowave.com.tw
ETC [ ETC ]
