Hesai Mechanical LiDAR

2021/2022 catalogue now available

Please see the below product matrix for an overview of the products currently available from Hesai.

If you require any additional information, please visit Hesai LiDAR or contact us.

 

LIDAR product matrix

 

Download Hesai LiDAR product catalogue

Datron Technology are pleased to announce the latest products to join our line-up: HESAI LIDAR.

From 64 channel Mechanical LiDAR, to Solid State, to All-in-One Sensing Solutions, we can offer something to suit any application.

 

We understand that it’s a bit of a difficult period for many companies, but we are still working remotely and available by phone or email.

Please don’t hesitate to get in touch if you have any questions!

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Using Inertial + GNSS systems from Oxford Technical Solutions, it’s possible to get some amazing results where a GPS-only product would fail.

 

Swedish Tunnel- Post Processing PDF

 

pptunnel2

Direct geo-referencing of airborne images with high precision GNSS technology is an established practice used in aerial survey mapping projects. Unfortunately the use of integrated systems of high quality aerial cameras and orientation sensors has until recently been limited because it was prohibitively expensive. However, the introduction of the Inertial + Navigation system has changed all of that, by improving the measurements and reliability of GPS systems. By combining a high accuracy GPS receiver with the Inertial+ system, a digital camera and a low-altitude aircraft, it's now possible to capture accurate, yet cost-effective, high quality aerial photographic images. This new, low-cost technology has been widely embraced and is now used in a number of applications from aerial, agricultural, land and road surveying to road monitoring, road profiling and asset management.

So how does the Inertial +2 system work?
The Inertial+2 was designed as a drop-in component and takes the serial NMEA data from current GPS receivers, blends it with inertial sensors and outputs the improved data in the same NMEA format. Other input and output formats are also supported.
What are the advantages of the Inertial +2 system?

Smooth Position
GPS often jumps because of multipath and changes to the satellite constellation. The Inertial+2 measurements are computed from the gyros and accelerometers, which do not jump. GPS is used to update these measurements and prevent them from drifting.
See opposite image, Inertial + in RED, GPS in Yellow. The GPS misses sections on the route which shows the need for the Inertial+ to complete the actual route taken.

Download sample DATA

Continuous Position

Even when GPS is not able to make a measurement, the Inertial+2 will output from its inertial solution. Using a wheel speed odometer input the drift rate in position can be as low as 5 metres in 2 minutes.

Orientation
As well as improving position and velocity measurements, the Inertial+2 measures Heading, Pitch and Roll. These are important for correcting cameras or laser sensors.

Dual-Antenna GPS
The Inertial+2 system is designed to use dual-antenna GPS for even greater heading accuracy. Using two GPS receivers, a very accurate and stable heading measurement is possible under low dynamic conditions, such as aircraft flights. Heading accuracy is constant during long flight lines, where inertial systems typically reduce in accuracy.

Save Time
It takes a lot of time to correct poor GPS measurements by hand. Often geo-referenced data is lost because of poor GPS. Hours of time and many geo-referenced images can be saved with an Inertial+2.

Technology
The Inertial+2 system includes three angular rate sensors (gyros), three servo-grade accelerometers and all the required processing in one very compact box. An internal low-cost GPS provides accurate time alignment and makes it simpler to use. Simple configuration software allows the user to change the mounting angle; displace the measurement point to a virtual location; change the GPS receiver type and many more. Once configured the Inertial+ works autonomously and does not require user attention. It can be used by non-skilled operators.

The internal logging enables the Inertial+2 range of products to work stand-alone . Post-mission, data can be output in ASCII text format and loaded in to the software of your choice. The outputs from the Inertial+2 have less delay, or lower latency, than GPS. It is not necessary to wait for the GPS measurement before the data is output. The GPS corrections will still be accepted if they are more than 0.5s late. The precision ADC in the Inertial+2 systems gives more than 20 bits of resolution. The resolution of the acceleration measurements is 0.12mm/s² (12ug). The ADC oversamples the analogue sensors and uses coning/sculling motion compensation algorithms to avoid aliasing of the signals. The internal processing includes the strap-down algorithms (using a WGS-84 earth model), Kalman filtering and in-flight alignment algorithms. The internal Pentium-class processor runs QNX real-time operating system to ensure that the outputs are always delivered on time. What are some of the practical applications of Inertial +2?

There are many key features that make the Inertial+2 easy to use and highly effective.
The Inertial+ 2 system has been used in projects such as power line monitoring where the systems are mounted on a helicopter or light aircraft. Road applications include measuring vegetation along roads prior to hedge trimming. Road safety planners have also used mobile mapping because it can give vital information about potential road hazards like how far round a bend a driver can see from ground level. Improving road safety is an important project for the European Union and many companies are looking at ways of giving clearer information to drivers about road hazards.

Air travellers have faced a series of disruptions over the last few years, thanks mainly to volcanic eruptions and the lingering effects of ash particles in the air. First there was the eruption in 2010 of the Icelandic volcano, Eyjafjallajökull, which caused the cancellation of thousands of flights and the closure of hundreds of airports through northern Europe: then there was the recent eruption of the Chilean volcano, Puyrhue-Cordon Caulle which caused chaos in South America and forced the cancellation of hundreds of Qantas flights in Australia and New Zealand.

There were understandable and widespread criticisms of both the airlines and the civil aviation authorities for the way they went immediately into lock-down: many critics felt the reaction was both disproportionate and illogical as there was no provable evidence to suggest that jet engines would be adversely affected by tiny airborne ash particles. However, in fairness to the authorities they were left with little choice, given passenger safety had to be their number one priority. Yet, could they have done things differently? Well, it appears perhaps they could. The Swiss authorities managed to keep all of its airports open during the Icelandic crisis after conducting its own tests to ascertain the levels of ash within its airspace using a motorised glider equipped with GNSS and LIDAR equipment along with a laser-driven aerosol particle counter.

The pilot of that particular aircraft was Jorg Hacker, Associate Professor of Airborne Research Australia, and head of Environmental Research at Flinders University, Adelaide. He has recently conducted further tests in Tasmania on behalf of Qantas Airlines to check the levels of the residual ash in Australian airspace after the Chilean eruption. Using a specially designed ECO-Dimona aircraft packed with scientific instruments, Hacker determined that there was no longer any danger posed by the retreating ash cloud. Flights have now resumed.

Although the motorised glider was not pressurised, Hacker and his co-pilot were able to take their aircraft up to altitudes of over 20,000 feet using oxygen cylinders. The aircraft's detachable wing pods and fuselage were stuffed full of GPS and LIDAR technology and also carried the latest meteorological sensors to measure wind temperature, humidity and air-particulates. Hacker's task was to capture air samples using an iso-kinetic outlet attached to the aerosol particle counter.

The iso-kinetic outlet slowed down the speed of the air so that it could be accurately measured and analysed by laser. This information was fed to the banks of computers onboard and cross-referenced with GPS co-ordinates and LIDAR mapping to give a real-time view of exactly what was happening outside the plane and allowed the vertical profiling of any pollutants that were present in the atmosphere. This information was then transmitted back to the ground for further analysis. 

It's hoped that this technology will be embraced by other countries, so that early tests on air quality and safety can be carried out in the event of any further eruptions. Grounding aircraft is very costly, and is something the airlines would obviously prefer to avoid if at all possible. The short grounding of Australian planes over the course of just two days cost Qantas an estimated $21 million.

Improve your GPS with our Inertial+
Targeted at the survey market, the Inertial+ represents a big move in the Inertial+GPS navigation system market by being very cost-effective. The low price tag does not stop it from being highly accurate though. By combining an Inertial+ with your high accuracy RTK GPS receiver you can achieve 1cm precision, 0.03 degrees roll/pitch accuracy and have low drift rates when GPS is not available.

 

LIDAR Mobile Mapping

OxTS’s Inertial+ and Riegl’s Q120 scanner are perfect for cost effective mobile mapping applications.The Inertial+ is a low-cost inertial and GPS navigation system, ideal for correcting LIDAR systems. To read more and see some stunning data, click here…
 

Road Condition Assessment
The Swedish Road Administration is using OxTS' inertial and GPS navigation systems to assess the condition of its vast road network. To read more click here…


Inertial+ used for airborne LIDAR surveys
Scandinavian Laser Surveying Aps in Denmark has combined the Inertial+ with a Riegl laser scanner, giving them a low cost, precision airborne LIDAR system for surveying. To read more click here…

 

Example Road Survey Data in Google Earth

Want to see some example data on how the Inertial+ can improve the measurements from your GPS receiver? We have some Google Earth data that compares the GPS-only data with data from an Inertial+. Click here…
 

 

Finalised Trimble 5700 Integration

The integration of the Trimble 5700 receiver has now been finalised. The Inertial+ can be used in combination with many GPS receivers, providing a cost-effective solution to improve your GPS measurements even in difficult GPS conditions. To view a list of all integrated receivers click here…
 
 

Test the Inertial+ for free!

Demo systems are available in almost all countries. If you are interested in testing the Inertial+ systems, please contact us to arrange a suitable date for you.