Frequently Asked Questions

Here you will find the most frequently asked questions that we receive at Towny Branford Ltd.
If you can not find the answer to your question on this page then please get in touch with us and we will endeavour to answer your queries.

WHY DO I NEED A VMS RADAR SYSTEM?

Off highway vehicles work in close proximity to people and other vehicles.
An accident in this type of environment could be very costly, or even worse, result in loss of life.
Accidents are caused by the unexpected, and when a machine is reversing on a busy site the unexpected can happen so quickly that only automatic braking can prevent a collision.
VMS uses the Ogden Radar to monitor the area immediately behind the machine, and then applies the brakes automatically if a hazard appears in that area.

CAN A VMS RADAR SYSTEM BE USED IN TIGHT WORKING ENVIRONMENTS?

Over the years we have installed VMS systems on all sorts of off-highway vehicles working in a wide variety of environments.
During this time we have developed a range of detection and braking ranges which are suitable for almost any site, but if you are not completely satisfied with these settings we can easily customise the system to your requirements.
If you have any concerns or questions please contact us.

WHAT SIZE AND SHAPE ARE THE PROTECTION ZONES OF THE VMS AND SENSOR VISION RADAR SYSTEMS?

The simple answer is that the size and shape of the protection zones can be completely customised to your requirements.
Below is a example of our standard VMS protection zones:

SBRadar_Typical_VMS_Range1-3
WHAT IF THE RADAR FAILS?

The radar is a tried and tested design, but no system can be guaranteed never to fail so we build in as many fail safe checks as possible.
If the radar is working correctly there will always be some reflected signal to analyse, even if it is only the reflection from the inside of the radar window. So if there is no signal to analyse then the radar sends a fault message to the cab unit.
The radar sends a message to the cab unit every 50 milliseconds, then sends the same signal inverted so the cab unit can check it has received it correctly. So if any wire breaks, or the radar fails, the cab unit knows within 100 milliseconds.
What action the cab unit takes will depend upon the system. Careful consideration has to be given to the safest response to a failure, especially automatic braking systems. With each system the driver is warned and the machine set to the safest fall back position.

WHAT IS SPEED AND DIRECTION SENSING AND HOW DOES THIS INCREASE SAFETY?

When an object is moving with respect to the radar, this movement creates a Doppler effect on the return signal. Our radar uses frequency modulation to measure the distance, but it is also possible to extract the Doppler information from the signal and measure both the speed and direction of movement. This is then used to determine whether objects within the protection zone are moving towards the machine or away from it, so that objects moving away do not trigger a response. In certain circumstances the speed of movement may be used to trigger an earlier response to objects closing more quickly.
The advantage of these measurements is that the radar response can be better related to real hazard conditions. Experience shows that safety is enhanced if the driver is aware of movement behind the machine before he engages reverse gear, and if he is aware of other vehicles approaching his rear when driving forward.
By sensing the direction of movement the system can eliminate unwanted responses without limiting the response to only when reverse is engaged. It also removes a possible source of system failure caused by failure of the switch detecting reverse gear.

WHAT TYPE OF VEHICLES ARE SUITABLE FOR A VMS AUTO BRAKING RADAR SYSTEM?

Most off highway mobile plant machines can be fitted with the VMS system but a engineer may need to perform a survey of the vehicle to determine the suitability of the machine if we haven’t had any experience with that particular model in the past.
Over the years we have installed VMS systems on Wheeled loaders, Articulated/Rigid Dump trucks, Scrapers and Fork trucks amongst other vehicles. For more information please do nt hesitate to contact us.

WHY IS THE OGDEN'S FMCW RADAR THE BEST ON THE MARKET?

Numerous studies have shown that for the quarrying and mining environment, radar has the ability to see through all the dirt, dust and rain that defeats other techniques. FMCW (Frequency Modulated Continuous Wave) radar is a particular radar measuring technique ideally suited to this application.
Off highway vehicles work in close proximity to people and other vehicles. The hazard detection sensor must separately monitor multiple objects of very different sizes and identify the object which presents the immediate hazard. If that object is a man, his signal must be separated from that of a much larger object in the background, even when they are approaching at the same speed. FMCW radar can do this.
Reverse protection systems which are only active when reverse gear is engaged will not warn the driver of something or someone behind his machine until he engages reverse. In the busy world of off highway machines the driver needs to know what is happening behind him all the time, e.g. whether he is about to reverse over someone or maybe turn into the path of a small truck about to overtake him.
However if you make the system active all the time you must avoid alarming all the time. You must separately identify stationary objects, objects approaching and a person standing immediately behind the machine. FMCW radar can do this.

WHY SHOULD I USE TOWNY BRANFORD LTD TO INSTALL MY RADAR AND CAMERA BASED REVERSING AIDS?

At Towny Branford Ltd we are committed to providing our customers with the highest level of service and after sales support. With over twenty years experience of installing and servicing this equipment, we are in the best position to fulfil any requirements you may have. Our team of trained engineers and fitters cover the country providing a speedy, quality service keeping costly down time to an absolute minimum. We believe in building lasting relationships with our clients and will go out of our way to help no matter how large or small the task.

Liebherr have used VMS Safety Systems for many years due to the quality of the product and the efficiency of the service. As a leading manufacturer in the earthmoving industry we would only be associated with the best in the business. I have personally used the service on many occasions, it's always fast, friendly and efficient with very little if any assistance on our part.
The engineers at Towny Branford Ltd were called in to fit out one of my machines with a Work Light Demo Kit that I had seen on their website. I was so impressed by the choices that the demo system could provide so that I could make the right decisions about the kit that my machines needed while keeping within my budget. Subsequently I have made sure that Towny Branford Ltd will be fitting the rest of my fleet of machines with the same kits in the near future.
These guys really know what they are on about and were on site within a matter of days to fit out one of my machines with the VMS radar system. There will be a lot more machines to fit out in the near future.
I have used Towny Branford Ltd for a number of years now and will always turn to them for everything I need no matter how big or small. The engineers have a great knowledge of the systems they are fitting and are always prepared to go that extra mile to ensure that everything is installed as professionally and quickly as possible so that the machines have as little downtime as they can.
Still can’t find what your looking for?
If you can not find the answer to your question on this page then please get in touch with us and we will endeavour to answer your queries.