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Features

Non-contact, high-speed, solid-state laser speed and length measurement with no slippage, drift or mechanical wear and greatly reduced maintenance compared with contact wheel / roller systems.
Bidirectional speed and length measurement; accurately measures speed and length during line stoppage, reversal and creepage.
UKAS-traceable calibration; accuracy better than 0.05% and repeatability better than 0.02%.
Rugged industrial design for use in harsh factory environments.
Available fitted with industry-standard communcations interfaces for easy integration with PLCs and production line equipment.
Excellent value with low cost of ownership.
Harsh environment enclosures are available from Proton Products on request.

Introduction

InteliSENS^TMProton Products InteliSENS^TM SLRM Series non-contact, bidirectional speed and length gauges provide extremely accurate speed and length measurements for metals industry applications. They are available with extended stand-off distances and greater depth-of-fields than the standard InteliSENS^TM SL Series gauges, which allows them to be used to measure very high temperature objects such as in hot-rolling processes.

Automatic direction detection and measurement down to zero speed means that the InteliSENS^TM SLRM gauge length measurement counts both up and down, so final length measurements will still be accurate to 0.05% even with production lines that exhibit stoppage, direction reversal and creepage.

Applications requiring a precise cut-to-length process benefit from the non-slip and highly accurate laser measurement technique which reduces scrap, increases uptime and improves material yield by eliminating product “Give Away” or “Short Length” claims.

InteliSENS^TM SLRM Series gauges are money-saving, direct replacements for traditional problematic and high-maintenance contact wheel and roller-type devices and are extremely easy to install and operate. Integration with production line controllers such as PLCs is eased by the availability of a wide variety of industry standard communications interfaces.

Operating principle

Proton Products InteliSENS^TM Series speed and length gauges illuminate the measured surface with a precisely pitched interference pattern created by the intersection of two laser beams. The alternating bright and dark interference fringes modulate the light scattered by the object with a frequency proportional to the object speed. This scattered light is detected by a photodiode and the electrical signal digitally processed to determine the frequency and hence the speed. Object length is then calculated by integrating the speed measurement over time.

The InteliSENS^TM SLRM series bidirectional speed and length gauges extend this principle by using a high-frequency Bragg cell modulator to illuminate the measured surface with a scanning interference pattern, which generates an oscillating light signal even when the object is stationary. Direction of motion is determined by whether the scattered light frequency is higher or lower than the stationary frequency.

Specifications

Model SLRM	6060	120120	150200	200100	200200	250200	Units
Stand-off distance*	600	1200	1500	2000	2000	2500	mm
Stand-off distance*	23.6	47.2	59.1	78.7	78.7	98.4	inch
Depth-of-field	60	120	200	150	200	200	mm
Depth-of-field	2.36	4.72	7.87	5.91	7.87	7.87	inch
Maximum speed (bidirectional)	4000	8000	TBA	5000	5000	5000	m/min
Maximum speed (bidirectional)	13100	26200	TBA	16400	16400	16400	ft/min
Weight	3		TBA	4.5	4.5		kg
Weight	6.6		TBA	9.9	9.9		lb
Length	230		297	198.5	302		mm
Length	9.06		11.69	7.81	11.89		inch
Width	130		140	288	130		mm
Width	5.12		5.51	11.34	5.12		inch
Height	75		93	97	75		mm
Height	2.95		3.66	3.82	2.95		inch

Other stand-off distances are available on request.

Common Specifications

Specification	Minimum	Typical	Maximum	Units
Accuracy*			0.05	%
Repeatability			0.02	%
Acceleration			500	m/s²
Measurement interval			40	µs
Laser spot size			3	mm
Operating temperature	5		45	°C
Operating temperature	41		113	°F
Environmental protection			IP67
Power supply	15	24	25	VDC
Power consumption			20	W

only valid if the measured object is positioned within the central 20% of the depth-of-field.

Measurement units (end-user configurable)	Speed	metres/minute	feet/minute
Measurement units (end-user configurable)	Length	metres	feet	yards
Laser safety control inputs	Laser	An external closed SPST contact enables the laser diode.
Laser safety control inputs	Shutter	An external closed SPST contact opens the laser shutter.
2×Logic inputs (end-user configurable)	Electrical	Maximum input voltage: +24Vdc
	Function	Length reset	Display hold	Length hold
		Speed hold	Direction	Pause
3×Relay outputs (end-user configurable)	Electrical	Isolated, floating relay contacts
		Maximum voltage: 50Vdc	Maximum current: 0.5A
	Function	Gauge OK	Laser at temp	Shutter open	Laser on
		Measuring	Preset Length 1	Preset Length 2
3×Pulse outputs (end-user configurable)	Electrical	Opto-isolated differential pairs
		Output voltage: 5V or user supplied (up to 24V)
		Maximum frequency: 250kHz
	Function	Quadrature	Index
Analogue output (end-user configurable)	Electrical	Output voltage: 0 to +10V (end-user scalable)
Analogue output (end-user configurable)	Function	Speed	Good readings
CANbus communications		Connects to an optional Proton Products AiG2 interface display unit
Serial communications		RS-232	RS-422 / 485
Optional communications (factory-installed, choice of one)		PROFIBUS	Ethernet/IP	DeviceNET
Optional wireless communications (factory-installed, choice of one)		WiFi	Bluetooth

Accessories

Proton Products offers the M Series range of harsh environment enclosures and accessories for SLM and SLRM Speed and Length gauges deployed in high temperature, dusty, steamy or smoky environments.

X-BOX

Double-wall, stainless steel harsh environment protection enclosure

Suitable for hot-rolling applications.
Protects against high temperatures, light impact, liquid splash, dust, steam and smoke.
Provides a unified electrical connector for electrical and communications connections.
Provides ports for the gauge air wipe and water cooling.
May be fitted with optional
- thermal insulation baffles (TBA)
- water cooling plate (TBA)
- air-driven vortex cooler (00043MC039) for enhanced thermal shielding from hot metal objects.

Proton part number: 00041MC570

BT-100

Power supply and break-out box

Connects to the unified electrical connector of the SLX-BOX (00041MC540) via a Cable SLH/X to BT100 (00041CX100).
Provides screw terminal access to all “INTERFACE” connector input and output pins.
Provides DB9 connectors to access the “CAN”, “RS-232” and “PROFIBUS” ports.
End user cables are sealed with four cable glands.
Supplies 24VDC electrical power to the gauge.
Input voltage range: 90 - 260 VAC @ 45 - 65 Hz.

Proton part number: 00041MC350

Cable SLH/X to BT100

Cable for connecting the unified electrical connector of a SLX-BOX (00041MC540) enclosure to a BT-100 (00041MC350) power supply and break-out box.
Length: 100 m.

Proton part number: 00041CX100

Air services unit

Provides filtered air which is dust, water and oil free.
May be used to drive vortex coolers, air amplifiers and air wipes.

Proton part number: 00041MC370

Speed & Length Measurement

InteliSENS™ SLRM Series