MODEL 2535
1622T7／1521T／1521N
Non-Contact Laser Doppler Measurement System
Laser Doppler Velocity Meter For Vehicle Speed Measurement

This MODEL 2535 is a Non-Contact Laser Doppler type velocity meter, which is a specificinstrument to the measurement of ground speed and travel distance of vehicle or railway train.
By fluctuation range of measurement distance from ±80mm to 100mm, a ground speed ismeasured with a high degree of accuracy even if a measured track or road is bumpy, forexample which has ballast, rail, extension rail, ATS or others. This non-contact laser Doppler
measurement system makes the accurate measurement from a stop point (0 velocity), without
errors from slip, idling, or abrasion of wheels.
Feasures* Non-contact measurement system with higy accuracy* The accurate measurement even if a measured track has any rail, sleeper, ballast,
bracket or others* Also available for a measurement in a tunnel or other indoor places* Available for a measurement of travel distance from 0 velocity with high accuracy* The true acceleration and deceleration performance is measured in a test of actualvehicle* A measurement result is displayed on the indicator and also output as a data file via
USB interface or other external output

Basic Specifications: MODEL 2535/MODEL 1622T7/1521T/1521N【Doppler Sensor】

MODEL1622T7
From -750 to +750km/h

Velocity range（at SF=0.6）

MODEL1521T

MODEL1521N

From -560 to +560km/h（at SF=0.8）

From -500 to +500km/h（at SF=0.9）700mm±100mm

Distance (focus)

500mm±80mm＊The fluctuaring range may varies depending on the surface of measured object.

Accuracy

Within ±0.2％

Laser690nm, 5mW or less (Class-3B)

Demensions and weights

187(W)×44(H)×97(D) mm
Approx. 0.95kg

780nm, 38mW at the maximum (Class-3B)
170(W)×42(H)×97(D) mm
Approx. 0.8kg

90(W)×40(H)×140(D) mm
Approx. 0.6kg【Signal Processor: MODEL 2535】

Display

Velocity
Update rate

7-decimal digits, The minimum resolution: 0.001km/h,
Update rate: 2ms

Distance range From 0.001 to 999999.999m

Displayed resolution: 1mm

Velocity voltage output

16-bit D/A output
Output voltage: 0±4V, with selectable full scale Accuracy: within ±0.5%

Pitch output

A and B, 90 degrees Phase difference output
Interval: 0.1～1000.0mm (the resolution of 0.1mm)
Format: Open collector, RS-422

External I/O terminal

External monitor output or External switch input

External monitor For displaying the measurement result of velocity, travel distance or others

Options
External switch For controlling the operations of start and stop (acceleration and deceleration)
InterfaceUSB, RS-232C

Power

From DC10V to 30V, or depending on the dedicated AC adapter

Demensions and weights

199(W)×74(H)×140(D) mm, excluding projections Approx. 1.4㎏

The Output Terminals of MODEL2535Pulse Distributor MODEL 5452 (Optional)
The Model 5452 is a pulse distributor for
ACT vehicle speed measurement system,
to distribute pitch-pluse signal of travel distancefrom ACT Laser Doppler Vehicle VelocityMeasurement System among 6 devices.

【Applications】
Brake and Crash Test

Location Measurement an Inspection Car①Cavities in a road

②Cracks in a tunnel③As a camera shutter clock to take a picture

アクト電子株式会社
ACT ELECTRONICS CORPORATION

Appearance Inspection System
Accurate consecutive images is taken by using a line
sensor camera with the pulse of moving distance

4-7-16, Nakahara-ku, Kawasaki, Kanagawa
JAPAN 211-0051
TEL: +81-44-589-8180 FAX: +81-44-589-8181

http://www.actele.co.jp
NOTES: Specifications, design and descriptions are subject to change without notice for further improvement.

March, 2022