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Ultrasonic Ranging Module Subsystems 型號:HL17-

北京中西化玻公司
:/83/78
:ztt@netcn.net

The Massa Ultrasonic Ranging Module is a precision electronic measurement device which includes an interface electronics moduleone or two ultrasonic transducers, depending on the model selected. The ranging module provides the OEM with a PWMLATCH output pulse, whose duration is proportional to the time required for the sound to travel between the transmitreceive transducers. The LATCH pulse width may be processed through additional circuitry for applications requiring position, level, profile, or thickness measurements.

Internally or externally triggered, target distance ultimay limits the maximum pulse repetition rate. A maximum rate of 150 Hz is possible when targets are less than one foot distant; refer to individual module specifications for rep rate limits. For internal triggering, the pulse repetition rate is set via a single external resistor.

The E-201B Series utilizes two transducers, one to transmitone to receive acoustic pulses. This arrangement allows them to be mounted side-by-side for an echo ranging application, or mounted opposing one another for high speed counting or accurate measurements at over twice the range possible with echo ranging. Two transducer echo-ranging configurations also provide shorter minimum target distances, required for certain applications.

The E-220B Series utilizes a single transducer for both sendingreceiving acoustic pulses. This arrangement is ideal for applications where a limited area is available for mounting the sensor. Minimum target distance is slightly farther than two-transducer configurations.

Optional transducer mounting brackets provide for easy adjustments to sensor alignment during installationhave been specifically designed to minimize crosstalk between paired transducers (E-201B).

Request Massa''s Application Guide To Ultrasonic Sensing for a comprehensive review of application considerations.

Applications

Ultrasonic Micrometer

Non-contact Profile Gauge

Precision Limit Switch

Thickness Unifomity Control

Precision Proximity Detection

High Speed Counting

Features

Remoy Mounted Sensors

Resolution to +/- 0.010 inches

Single Supply Operation

Low Current Drain

Internal or External Trigger

Ultrasonic Ranging Module Product Selection Guide

Individual Specifications

Model Number

E-201B/215 E-201B/150 E-220B/215 E-220B/150 E-220B/40 E-220B/26
Transducers Supplied

Two Two One One One One
Detection Range1
Echo Ranging
Opposed Alignment2

3"-24"
3"-48"
5"-60"
5"-120"
4"-24"
N/A
8"-60"
N/A
2''-20''
N/A
2''-30''
N/A
Resolution:
Instantaneous3
Averaged4

0.03"
0.2%
0.04"
0.1%
0.03"
0.2%
0.04"
0.1%
0.3"
0.1%
0.4"
0.1%
Beam Angle5,6

10 10 10 10 15,35 15,35
Transducer Frequency

215 kHz 150 kHz 215 kHz 150 kHz 40 kHz 26 kHz
Maximum Pulse Rate

150 Hz 100 Hz 150 Hz 100 Hz 25 Hz 20 Hz
Notes:
1- Nominal values at ambient temperature, pressurehumidity;
2- One transducer affixed to each of two objects, then aimed at each other;
3- Conservatively rated, improved dramatically with constant, controlled environment;
4- Percent of range; averaging processed externally, typically using a computer or PLC;
5- Total width at -3 dB points, no secondary lobes exist with /150 & /215 transducers;
6- Detachable horn supplied with /40 & /26 transducers provides smaller beam angle (required for maximum range).

General Specifications

Output Pulse Width (LATCH)1

Echo Ranging 147.5 usec per inch (or 1.77 msec per foot) of target distance

Opposed Alignment 73.75 usec per inch (or 0.89 msec per foot) of sensor separation)

External Trigger Pulse Width

Optionally Required 180 +/- 10 uSec
Digital Output (LATCH) Sink Current

N-Channel MOSFET 30 mA @ Vds=0.5 V
Voltage Requirements

Limits
Recommended 8 to 15 V DC
12 V DC
Power Requirements (Nominal)

20 mA @ 8 V DC
30 mA @ 15 V DC 160 mW
450 mW
Temperature Range2

Operating
Storage 0 to 60 C
-25 to 85 C
Humidity

Non-condensing 0 to 90%
Transducer Construction

Sealed Housing
Standard Housing /215 & /150 Models
/40 & /26 Models
Weight

Electronics & Transducers 4 to 8 oz.
Transducer Cable Lengths

With Connectors 2 ft., 6.5 ft. & 16 ft.
Notes:
1- When ambient temperature is 20 C;
2- When ambient temperature exceeds 50 C, E-220B series modules operating at 12 V DC input will require a 75 kOhm resistor between the TRIG INGND pins. Minimum sensing range will increase (move out) by approximay 5%. Please contact factory for additional information.

Ordering Information

Specify the part number which corresponds to both the model numbertransducer cable length desired. Specify the optional mounting bracket part number as listed for each model number.

Model Number
2 ft. Cable
6.5 ft. Cable
16 ft. cable
Mounting Bracket

E-201B/215
200344-501
200344-502
200344-503
200359-1

E-201B/150
200343-501
200343-502
200343-503
200362-1

E-220B/215
200374-501
200374-502
200374-503
200358-3

E-220B/150
200373-501
200373-502
200373-503
200358-2

E-220B/40
200355-502
200355-505
200355-506
200358-1

E-220B/26
200355-501
200355-503
200355-504
200358-1

Functional Block Diagrams

Timing Diagram

Circuit Connections

Physical Dimensions
Mounting Brackets

Transducers

Electronics

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