Laser Tiltmeter

Overview

Features Technical Specifications Applications Mounting Options Downloads FAQ Product Family
LS-G6-LAS-TIL90

Laser Tiltmeter

  • 3-in-1 laser distance meter, inclinometer and data logger designed to provide robust data when monitoring inclinations, movements and differential settlements of slopes or infrastructure.
  • Field-proven, non-intrusive method for convergence monitoring with minimal interference to tunneling activities.
  • Great communication ranges underground, with up to 10 km using repeaters.
  • Laser Tiltmeter is compatible with Worldsensing’s single-net and multi-net configurations.
Access full specs

The Worldsensing Laser Tiltmeter (LaserTilt90) uses a laser to measure distance to reference points and a tiltmeter to detect vertical deviations in ground or structures.

±90° range and 3-axis inclination

measurement for flexible installation options

Easy relocation

When used in tunneling projects, LaserTilt90 can be moved after the measured relative displacements are stabilized and relocated into the final lining

Near-real time data

Allows to correlate changes with the excavation phases

New monitoring applications

Vertical settlement at a tunnel crown by measuring the relative distance and the angle

Setup wizard

Previous configuration available in the App to quickly configure a set of devices in the same project

Laser Tiltmeter technical specifications

Sensor type
2-in-1 Laser Distance Meter and 3-axis MEMS accelerometer
Power source
2 x 3.6 V C-size replaceable batteries
Memory
100 000 readings including time, distance and 3-axis tiltmeter measurements
Data transmission
LoRa radio communications (ISM sub GHz)
Operating temperature
-20º C to 60º C
Weather protection
IP68
System configuration
Locally via Worldsensing App or remotely using CMT Edge on single-net deployments and CMT Cloud on multi-net deployments

Laser distance meter

Sensor
Visible laser class II with 655nm
Laser power
0.75 to 0.95 mW
Resolution
0.1 mm
Repeatability (1 sigma)
0.15 mm
Accuracy
±1 mm at 10 m ±4 mm at 50 m ±16 mm at 150 m

Tiltmeter

Sensor
3-axis MEMS accelerometer
Range
±90º
Accuracy (±4º)
±0.005
Repeatability
<0.0003º
Resolution
±0.0001º
Temperature sensor resolution
0.1ºC

Battery life estimations

Reporting period
20 m distance
65 m distance
5 min
1.8 years
6 months
1 h
10.2 years
5.1 years
6 h
14.3 years
12 years
Show full table +

See detailed information about sensor capabilities and battery life estimations in the Laser Tilt90 Product Datasheet

Laser Tiltmeter mounting options

Surface mounting

Using a LS-ACC-IN15-HP plate for horizontal and vertical mounting. Secures with anchor rods or glue and features a threaded hole for a monitoring prism or leveling screw.

Swivel mounting

Using a LS-ACC-LAS-NSB swivel mounting bracket. The swivel mounting bracket allows swivelling around the vertical axis (± 90°) and a minor rotation of the enclosure on the plate (±3°). It can be fixed to a pole with 50 mm U-bolts or anchor rods. Use the LS-ACC-LAS-SB  for fixing on a convergence bolt with G 3/8” male thread.

Vertical surface mounting

Using the LS-ACC-IN15-VP mounting plate for vertical mounting. The mounting plate can be easily fixed using anchor rods and magnets.

Adjustable vertical mounting

The LS-ACC-LAS-AP mounting plate for vertical surfaces is suitable for precise aiming of the laser beam. This support allows limited rotation along two axes relative to the reference surface.

Laser target

Target for Laser Nodes rotatable and swivelable 360º (compatible with convergence bolt G 3/8″ male thread, M8 anchor rods and M5 magnets).

For a full list of available accessories, check out the

Laser Tiltmeter product datasheet

Applications

We enable connectivity for reliable and comprehensive monitoring systems.

Convergence

Laser Tiltmeter

Leverage the power of Worldsensing’s 3-in-1 Laser Tiltmeter to monitor convergence across entrance ramps, tunnels, galleries, and any underground excavations. The Laser Tiltmeter may be easily relocated along the convergence cross sections up to the excavation front or until the measured relative displacements are stabilized when the required frequency of measurements is reduced. It can also be used when permanent monitoring is required. 

Laser Tiltmeter
LS-G6-LAS-TIL90

Structural health

Tiltmeter Laser Tiltmeter

Monitor static deflections of piles, piers, and decks using Tilt-XHP. Enhance data robustness with a 3-in-1 Laser Tiltmeter, which includes distance laser measurements to a reference point in the monitoring process.

Laser Tiltmeter
LS-G6-LAS-TIL90
Tilt-XHP
LSG7ACL-BXLH-TIL Tilt-IR
LSG7ACL-BILR-TIL

Cross-crack movements

Laser Tiltmeter Crackmeter Wireline extensometer

Detect slope movements by monitoring tension cracks across landslides using a displacement sensor compatible with Worldsensing’s Analog or Vibrating Wire data logger. For situations with large movements anticipated, wireline extensometers, draw wire sensors, or the Laser Tiltmeter can be suitable alternatives.

Vibrating Wire 6-channel
LSG7VW-6XL0 Vibrating Wire 2-channel
LSG7VW-2XL0 Vibrating Wire 1-channel
LSG7VW-1XL0 Vibrating Wire 6-channel RCR
LSG7VW-6IL0-RCR Vibrating Wire 2-channel RCR
LSG7VW-2IL0-RCR
Analog Data Logger
LS-G6-ANALOG-4
Piconode
LS-G6-PICO
Laser Tiltmeter
LS-G6-LAS-TIL90

Frequently asked questions

What is LaserTilt90?

The Worldsensing LaserTilt90 uses a laser to measure distance to reference points and a tiltmeter to detect vertical deviations in ground or structures.

How does a Laser Tiltmeter work?

The sensor uses a laser beam to measure relative distance against a target surface. It complements these readings with inclination measurements using the integrated tiltmeter. The data altogether is transmitted via Worldsensing LoRa networks to a CMT Edge for local-access, single-network deployments. For multi-project, multi-network deployments, data can be transmitted via the internet from the gateway to CMT Cloud. Data can be sent to third party software from CMT using standard file transfer protocols: MQTT, REST API, FTP.

What is the maximum data collection interval?

Devices can be configured at different reporting periods. The highest possible acquisition rate when using Worldsensing is one sample every 30 seconds, and the lowest is one sample every 24 hours.

What is the data logger communication range?

The radio range of any of Loadsensing devices varies depending on the environment. In open sight, the range can reach up to 15 km (9.3 mi), while in a city street it is up to 4 km (2.5 mi). When placed in a manhole in a city street, the range is up to 2 km (1.2 mi), and in a tunnel, it extends up to 4 km (2.5 mi).

How does temperature affect the measurement?

The change of temperature and weather conditions of the deployment can affect the measurements of the laser distance meter wireless sensor. However, temperature influences are considered on the accuracy of the sensor according to reading conditions. See the LaserTilt90 Product Datasheet for more details.

How do weather conditions affect the measurement?

The weather conditions of the deployment can affect the measurements of the laser distance meter wireless sensor. However, the resulting measurements comply with the accuracy of the sensor according to reading conditions. In addition, signal strength may vary due to the luminosity descension. See the LaserTilt90 Product Datasheet for more details.

What happens if the laser misses the target? How can I detect it?

When the laser gets out of the target, the signal strength will fall immediately and it will show a variation of the distance measured. The combination of both parameters will be key to detect it.

What happens when pointing at an irregular surface? What exactly is being measured?

When pointing to an irregular surface, the edges will hold different signal strength and distance measure will be the one that holds more power (the biggest irregularity).

Need more info or support? Talk to an expert

Laser Tiltmeter, part of the Loadsensing product family

Loadsensing is a family of long-range, low-power devices that allow you to wirelessly transmit sensor data to your information systems.

Discover family
LSG7ACL-BXLH-VIB LSG7ACL-BILH-VIB LSG7ACL-BILR-VIB

Vibration Meter

The Vibration Meter is a wireless sensor that automates data collection for long term, continuous vibration monitoring. It features a tri-axial accelerometer and an exception-based, edge algorithm that allows the detection of threshold breaches for vibration-based parameters such as LAW/PPV and frequency.

What they say about us

Discover how Worldsensing has made a positive impact, providing reliable solutions and exceptional support.

The set-up and installation was extremely simple. The data could be immediately transferred to the evaluation and visualization system. Its main advantage is its ability to send radio signals from under manholes and over a long distance. Read success story

Dr.-Ing. Andreas Wagner
Project Manager, Angermeier Ingenieure

We've had a good relationship with Worldsensing for a number of years and we are one of their early adopters. We've really seen the value in a wireless solution. The Modbus protocol implementation on the gateway allows for seamless integration to existing communication infrastructure. This also isolates access to the data and reduces the impact of network outage in the area. Read success story

Ben Scott
Technical Manager, Geomotion

A great advantage of the Worldsensing system is the ability to change the reading frequency from a click of a finger without the need to go on site. So no need to access every logger to change it, it can all be done online.


Geomotion Australia

The data we're getting is excellent. Remote access to the data is an improvement on having to send someone on site to take measurements. Read success story

Guillaume De Tonnancourt
Sales Manager, GEO-Instruments Canada (formerly GKM Consultants)

The integration and reporting have been seamless and highly reliable since the start of our project. Trust in the structural health monitoring system lets the mine owner focus on the next steps of the mine construction. Read success story

Vincent Le Borgne
Mining R&D Manager, GEO-Instruments Canada (formerly GKM Consultants)

The Worldsensing solution is robust and reliable in a challenging construction environment. Thanks to its simple installation and low maintenance, it reduces the time the team has to spend to re-enter the site to obtain key data for environmental risk control. Read success story

Zhangwei Ning, PhD
Technical Manager, Sixense Inc.

Embedded devices within the lining represents a major step forward in tunnel boring safety and efficiency. We can now drastically reduce the delays involved in installing and configuring tunnel monitoring systems, saving time and costs. Read success story

Guillaume Gehu
Contract Manager, Sixense France