Capable of detecting 2 channels and calculating difference with one main unit Detecting speed difference with high response and high accuracy using eye-safe laser

The LV-7000 series detects speed, uneven speed, distance, length of moving object or rotating object without contact. By contacting with 2 sensors, it enables to calculate difference in velocity/length between the two points in real time and output with 3,000 ppm of accuracy. The frequency response can be expanded up to 20 kHz, which achieves to understand phenomena and evaluate mechanical systems at high speed, efficiently, and accurately. It is useful for evaluation of motor control and behavior measurement, improving parts quality, and reducing loss of material.

Features

High sensitivity detection with the laser conforming to "Safety Class 2"
 
  • It does not need safety requirement for detection such as laser protection glass, laser control regions/controller.
  • Original optical system and demodulating circuit allow high sensitivity detection. Available to measure wide variety of targets.
  • Easy, quick positioning and checking with red visible light.
Non-contact detection, No-load measurement
 
  • High spatial resolution with small laser-spot. Enables measurement of thin/tiny target including thread/wire.
  • Not necessary to worry about defects such as scratch, wrinkle, or transformation.
  • Hardly affected by flipping, shaking. Slip or friction is not generated.
  • Enables speed and length measurement in vertical driving, negative gradient driving, which are difficult to detect by contact-type detector.
  • Expansion speed/direction measurement of extensible materials including rubber, resin, and fabric.
Developed new model with additional functions and further performance improvement
 
  • By connecting two sensors to one main unit, it enables to calculate difference in velocity/length between the two points internally. It is useful for slip and torsion measurement in real time.
  • Added the wide band mode that expand the frequency response up to 20 kHz. More responseive measurement is available.
  • The detection velocity range can be extended up to 6,600 m/min. A wide range measurements from zero to high speed can be performed with one unit.
  • The touch panel and condition memory function allow speedy operation.

Application

Torsion/torsion vibration measurement

ねじれ・ねじれ振動測定

Torsion or torsion vibration measurement of transmission power train, drive-train, rotation shaft, turbine, forging crank and shaft.

Speed and behavior measurement of tire

タイヤの速度・挙動測定

Behavior measurement between tire and grounding surface, such as speed difference, peripheral speed change/difference, torsion, deformation, slip.

Behavior measurement of pulley/belt

Speed, slippage, expand or contract, and differential of belts for crank pulley, alternator, compressor, compression machine etc.

Measurement for material evaluation

Detection of stretching position of material, difference of stretching position and stretching speed, behavior of compression/stretching.

Speed/uneven speed measurement

Speed/uneven speed measurement of paper, film, rubber, woven fabric, non-woven fabric, and plastic

Measurement of winding length

Length measurement of thread, wire for communication facility, copper wire for elevator, hose, harness and coated wire material

Conveyance slip amount measurement

Slip amount measurement on conveyance of printer, photo copy machine, scanner, paper, woven fabric, non-woven fabric and plastic

Conveyance at vertical/negative gradient

Speed·uneven speed measurement of paper, film, rubber, woven fabric, non-woven fabric, plastic on vertical/negative gradient conveyance

 

 

System configuration

lv7000system

 

 

Specifications

LV-7002 Laser Doppler Surface Velocity Sensor

Detection method Back-scattering differential type
Detection direction "+" when moving from the left to the right in front of the sensor
Distance accuracy Within ±0.2 % (Length evaluation by our standard plane at 25 °C)
Laser beam
Laser safety class Class2
Measuring laser beam λ=1550 nm
Less than 10 mW, CW oscillation
Guide laser beam λ= 635 nm
Less than 1 mW, CW oscillation
Laser spot diameter 2 mm x 1 mm, ellipse
Detection distance
Detection distance (center) 200 mm *from the bottom surface of the sensor
Detection range (depth) ±4 mm: within ±0.2 % (of reading)
±10 mm: within ±0.5 % (of reading)
(Length evaluation by our standard plane at 25 °C)
Sensor in general
Scale factor Approx. 7.5 μm Reflected automatically at power-on.
Detection velocity range 0 to ±1800 m/min
Maximum tracking acceleration 800 m/s2
Light receiving sensitivity monitor
Light receiving signal level (SIG LEVEL) Display the level in 5-segment LED (green)
Light signal error (ERROR) LED (red) lights up when demodulation error is occured.
Outer dimensions W 75 mm X H 40 mm X D 155 mm
Weight of the main unit Approx. 750 g (not including option/ cable)
Conforming standard
Laser safety FDA 21CFR Part 1040.10(CDRH)
IEC60825-1:2007,2014
JIS C 6802 :2007,2014
EMC FCC(Part15B):2015
CANADA EMI standard (ICES-003) : 2016
EN61326-1:2013 class A Table2
Safety EN61010-1:2010


 

LV-7210/LV-7220 Laser Doppler Surface Velocity Meter Main Unit

Model LV-7210 LV-7220
Number of Sensor Inputs 1 (CH A) 2 (CH A and CH B)
Detection in General Polarity Moving from the left of the front of the sensor to the right: +
Moving from the right of the front of the sensor to the left: -
Detection velocity range 0 to ±1800 m/min
0 to ±3600 m/min (with the LV-0730 for sensor added)
Measurement mode Standard mode
Wide band mode
Cutoff frequency Standard mode  5 kHz (LPF GAIN fc=-3 dB)
Wide Band mode 20 kHz (LPF GAIN fc=-3 dB)
Maximum tracking acceleration Standard mode 800 m/s2
1,600 m/s2 (with the LV-0730 for sensor added)
Wide Bandmode No upper limit
Detection distance range Standardmode 0~±10000 m(cannot measured when LV-0732 selected)
Voltage Output in General Number of output terminals 2 4
Output terminal shape BNC (receptacle)
Output voltage ±10 V(20 V p-p)
Output impedance 50 Ω or less
Output item CH A velocity, CH A length CH A velocity, CH A length
CH B velocity, CH B length
A-B velocity, A-B length
Velocity voltage output Voltage range        180 (m/min) /V
50 (m/min) / V 
10 (m/min) / V 
1 (m/min) / V 
360 (m/min) / V (sensor with LV-0730)
100 (m/min) / V (sensor with LV-0730)
20 (m/min) / V (sensor with LV-0730)
2 (m/min) / V (sensor with LV-0730) 
Measurement lower limit 180 (m/min) /V 0.23 m/min or less
50 (m/min) / V 0.063 m/min or less
10 (m/min) / V 0.013 m/min or less  (Wide band mode: 0.026 m/min)
1 (m/min)/ V 0.0026 m/min or less (Wide band mode: 0.003 m/min)
360 (m/min) /V 0.46 m/min or less (sensor with LV-0730)
100 (m/min) / V 0.13 m/min or less (sensor with LV-0730)
20 (m/min) / V 0.026 m/min or less (Wide band mode: 0.052 m/min) (sensor with LV-0730))
2 (m/min)/ V 0.0052 m/min or less (Wide band mode: 0.052 m/min) (sensor with LV-0730)
Linearity (DC offset excluded)
180 (m/min) /V Within ±0.2 % (F.S.)
50 (m/min) / V
10 (m/min) / V
1 (m/min)/ V Within ±0.3 % (F.S.)
360 (m/min) /V Within ±0.2 % (F.S.)
100 (m/min) / V
20 (m/min) / V
2 (m/min)/ V Within ±0.3 % (F.S.)
DC offset Within ±0.3 % (F.S.)
Low-pass filter (LPF GAIN fc = -3 dB) Standardmode OFF (5 kHz)
1 kHz
100 Hz
Wide Bandmode OFF(20 kHz)
5 kHz
1 kHz
100 Hz
Length Voltage Output Voltage range 1000 m/V
100 m/V
1 m/V
100 mm/V
10 mm/V
1 mm/V
100 μm/V
Linearity Within ±0.3 % (F.S.)
DC offset Within ±0.3 % (F.S.)

 

 

Option

 
Model Product name Description
LV-0703 Sensor cable Cable length 3 m
LV-0705 Sensor cable Cable length 5 m
LV-0730 High-Velocity Module for Sensor Detection velocity range: 0 to ±3600 m/min
LV-0732 Additional Velocity Range Velocity range: -270 to 3330m/min
LV-0740 Channel modification  
LV-0752 90-Degree Beam Bending Mirror  
LV-0762 Sensor Suspension Adapter  
LV-0773 RESET IN Cable One side open
LV-0774 ERROR OUT Cable  
LV-0793 Storage Trunk Common for LV-7210, LV-7220
LV-0015 XY-axis fine-control stage Stage face:60×60 mm, travelling amount:±5 mm
LV-0016 Z-axis fine-control stage Stage face:60×60 mm, travelling amount:0 to 10 mm
LV-0018A Steel plate  
LV-0030 Large magnet stand  

 

 

High-velocity module for sensor LV-0730

By attaching to the sensor, it realizes the detection velocity range of 0 to ±3600 m/min and extends the maimum tracking accelration to 1600 m/s2.

* Modification of the main unit is not required.
* Attachment/detachment to/from the sensor will be done in the factory of Ono Sokki. Please contact your nearest distributors or sales office.

 

 

LV-7002 + LV-0730

Laser beam
Laser safety class Class2
Measuring laser beam λ=1,550 nm Less than 10 mW, CW oscillation
Guide laser beam λ= 635 nm Less than 1 mW, CW oscillation
Laser spot diameter 2 mm x 1 mm, ellipse 
Detection distance
Detection distance (center) 172 mm *from the bottom surface of the sensor 
Detection range (depth) ±4 mm distance accuracy: within ±0.2 % (of reading)
±15 mm distance accuracy: within ±5 % (of reading)
*Length evaluation by our standard plane at 25 °C
Sensor in general
Scale factor Approx. 15 μm *Reflected automatically at power-on.
Detection velocity range 0 to ±3,600 m/min
Maximum tracking acceleration 1,600 m/s2
Outer dimensions W 76 mm X H 40 mm X D 183 mm
Weight of the main unit Approx. 900 g (not including option/ cable)

 

 

Additional Velocity Range LV-0732

By offsetting the velocity range to the positive side, it enables switching of detection velocity range from the standard range of 0 to ±1800m/min to the range of -270 to +3330 m/min. Also, when it is combined with the LV-0730 High-velocity module for sensor, the velocity range can be extended to -540 to +6660 m/min.

 

Detection Velocity in General Detection velocity range -270~3,330 m/min
-540~6,660 m/min (sensor with LV-0730)
Maximum tracking acceleration Standard
mode
800 m/s2
1600 m/s2 (sensor with LV-0730)
Wide Band
mode
No upper limit
Velocity Voltage Output Voltage range 333(m/min)/V
666(m/min)/V (sensor with LV-0730)
Measurement lower limit 333(m/min)/V 0.42 m/min or less
666(m/min)/V 0.84 m/min or less
Linearity (DC offset excluded) Within ±0.2 % (F.S.)
DC offset Within ±0.3 % (F.S.)
Output voltage -0.811 V〜+10 V

 

 

90-Degree Beam Bending Mirror LV-0752

LV-0752 90度反射ミラー

It is an optical jig used to deflect a laser beam at an angle of ±90 degrees at a desired position. It supports laser emission to a target in a narrow space or in the gap between equipment to enable the measurement.

*It can be used when LV-0730 mounted.
*The detection range (depth) is ±8 mm.

LV-0752 90度反射ミラー

Example

 

Sensor Suspension Adapter LV-0762

Attaching to the LV-7002 sensor increases the fixing positions, enables overhang of the sensor, suspension in an inverted manner, and four-way suspension of the sensor.

*It can be used when LV-0730 mounted.

LV-0752 90度反射ミラー

Example