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Palma TechnologyAbout productsLaser Velocimeter

Laser Velocimeter

General Description

Laser velocimeter is a system that use a laser having monochromatic wave and coherence by focusing the laser beam on a moving object. According to the Doppler Effect, the change in the wavelength of the reflected light is a function of the object's relative velocity.

As the velocimeter is being widely used in both steelmaking and non-ferrous industry, a variety of industry need non-contact velocimeter not affecting product quality and protecting itself from wear.

Palmatech has developed the first laser doppler velocimeter in Korea through combination of technology of laser application, signal processing and DSP technology accumulated for 10 years, which comprises sensor head with optical parts, signal processor for frequency analysis of scattering light and optic fiber connecting the former two.

| Principle & Method

- Laser Doppler Effect

| System Configuration

- Optical Sensor Head

- Optical Fiber Cable

- Signal Processor

| Special Features

- Non-contact velocity measurement

- Applying DSP algorithm

- Small sensor head

Hansu..

Hansung Aiuminum(in Daegu) Williamson Pyrometer. * Click this pict...

| Actual Delivered

Make sure of orign technology Korea patent application(commercialization under way)

Korea patent application 2001-72794

Korea patent application 2000-80015

Patent application No. 1999-61377, 61386

POSCO(Gwangyang) No.2CRM 2PL

| Applications

- Measuring velocity and length of rolled steel sheet in steelmaking industry

- Measuring velocity and length for industrial use

Steel sheets and wires (steel plates, cold mill, slab, paper, billet, etc.)

Tubes (pipe, wire, fiber, etc.)

- Verifying the velocity of a vehicle

- Measuring frequency shift in audio equipment

SPECIFICATIONS

System Specifications

System Performance	Measurement Range	0mpm to 4500mpm, 0 to 1000km
	Unit of Measurement	mpm(meter per minute) or m⁄s(meter per second)
	Update Time	<100ms(A⁄O), 300ms(RS232)
	Reproducibility	<±0.2%
	Accuracy	<±0.2%
	Standoff Distance	500mm, 1,000mm, 1,500mm
	Depth of Field	±100mm(at 1,000mm standoff distance)
Utility	Pure Air	5kg⁄㎠, Dry, Class 3, 25A pipe lines
Utility	Water	Non used ⁄ Used(customer request)
Environment	Ambient Temperature	0℃ to 40℃
	Relative Humidity	Non-condensing environment for sensors
	Signal Ground	Maximum 10Ω
	Frame Ground	Maximum 100Ω
	Power	220VAC, 60Hz, 1Phase

Interface

Analog Output(standard)	4 to 20mA, DC 0V to 10V output proportional speed
RS232(standard)	Speed, Length, Signal quality
Digital Input(standard)	Material present, Reset

Optical Sensor Specifications

Type	Heavy duty aluminum extrusion
Laser Source	Solid state diode Laser
Laser Safety Class	Class Ⅲ(b)
Laser Visible	Non visible(NIR)
Feature	Nitrogen(N₂) Gas, Pure air(beam path purge)
Relative Humidity	Non-condensing environment
Ambient Temperature Range	5℃ to 40℃
Power	220VAC, 60Hz, 1Phase
Sensor Cable(Optical Fiber)	120m (standard)

Signal Processor Specifications

Front Display	Speed(5 digits with floating decimal point), Length(7 digits)
Peripheral Interface	D⁄I, D⁄O, A⁄I, A⁄O, RS232 and TCP⁄IP(upon customer request)
Ambient Temperature Range	-5℃ to 45℃
Relative Humidity	Maximum 80%RH
Power	220VAC. 60Hz, 1Phase